Respuestas
Respuesta dada por:
1
A) ![x^2+4x+3=0 x^2+4x+3=0](https://tex.z-dn.net/?f=x%5E2%2B4x%2B3%3D0)
![a=1,\:b=4,\:c=3 a=1,\:b=4,\:c=3](https://tex.z-dn.net/?f=a%3D1%2C%5C%3Ab%3D4%2C%5C%3Ac%3D3)
![x=\frac{-4+\sqrt{4^2-4\cdot \:1\cdot \:3}}{2\cdot \:1}=-1 x=\frac{-4+\sqrt{4^2-4\cdot \:1\cdot \:3}}{2\cdot \:1}=-1](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-4%2B%5Csqrt%7B4%5E2-4%5Ccdot+%5C%3A1%5Ccdot+%5C%3A3%7D%7D%7B2%5Ccdot+%5C%3A1%7D%3D-1)
![x=\frac{-4-\sqrt{4^2-4\cdot \:1\cdot \:3}}{2\cdot \:1}=-3 x=\frac{-4-\sqrt{4^2-4\cdot \:1\cdot \:3}}{2\cdot \:1}=-3](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-4-%5Csqrt%7B4%5E2-4%5Ccdot+%5C%3A1%5Ccdot+%5C%3A3%7D%7D%7B2%5Ccdot+%5C%3A1%7D%3D-3)
![x=-1,\:x=-3 x=-1,\:x=-3](https://tex.z-dn.net/?f=x%3D-1%2C%5C%3Ax%3D-3)
B)![2x^2-20=6x 2x^2-20=6x](https://tex.z-dn.net/?f=2x%5E2-20%3D6x)
![2x^2-20-6x=6x-6x 2x^2-20-6x=6x-6x](https://tex.z-dn.net/?f=2x%5E2-20-6x%3D6x-6x)
![2x^2-20-6x=0 2x^2-20-6x=0](https://tex.z-dn.net/?f=2x%5E2-20-6x%3D0)
![a=2,\:b=-6,\:c=-20 a=2,\:b=-6,\:c=-20](https://tex.z-dn.net/?f=a%3D2%2C%5C%3Ab%3D-6%2C%5C%3Ac%3D-20)
![x=\frac{-\left(-6\right)+\sqrt{\left(-6\right)^2-4\cdot \:2\left(-20\right)}}{2\cdot \:2}=5 x=\frac{-\left(-6\right)+\sqrt{\left(-6\right)^2-4\cdot \:2\left(-20\right)}}{2\cdot \:2}=5](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%5Cleft%28-6%5Cright%29%2B%5Csqrt%7B%5Cleft%28-6%5Cright%29%5E2-4%5Ccdot+%5C%3A2%5Cleft%28-20%5Cright%29%7D%7D%7B2%5Ccdot+%5C%3A2%7D%3D5)
![x=\frac{-\left(-6\right)-\sqrt{\left(-6\right)^2-4\cdot \:2\left(-20\right)}}{2\cdot \:2}=-2 x=\frac{-\left(-6\right)-\sqrt{\left(-6\right)^2-4\cdot \:2\left(-20\right)}}{2\cdot \:2}=-2](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%5Cleft%28-6%5Cright%29-%5Csqrt%7B%5Cleft%28-6%5Cright%29%5E2-4%5Ccdot+%5C%3A2%5Cleft%28-20%5Cright%29%7D%7D%7B2%5Ccdot+%5C%3A2%7D%3D-2)
![x=5,\:x=-2 x=5,\:x=-2](https://tex.z-dn.net/?f=x%3D5%2C%5C%3Ax%3D-2)
C)![x^2-9x=-20 x^2-9x=-20](https://tex.z-dn.net/?f=x%5E2-9x%3D-20)
![x^2-9x+20=-20+20 x^2-9x+20=-20+20](https://tex.z-dn.net/?f=x%5E2-9x%2B20%3D-20%2B20)
![x^2-9x+20=-20+20 x^2-9x+20=-20+20](https://tex.z-dn.net/?f=x%5E2-9x%2B20%3D-20%2B20)
![a=1,\:b=-9,\:c=20 a=1,\:b=-9,\:c=20](https://tex.z-dn.net/?f=a%3D1%2C%5C%3Ab%3D-9%2C%5C%3Ac%3D20)
![x=\frac{-\left(-9\right)+\sqrt{\left(-9\right)^2-4\cdot \:1\cdot \:20}}{2\cdot \:1}=5 x=\frac{-\left(-9\right)+\sqrt{\left(-9\right)^2-4\cdot \:1\cdot \:20}}{2\cdot \:1}=5](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%5Cleft%28-9%5Cright%29%2B%5Csqrt%7B%5Cleft%28-9%5Cright%29%5E2-4%5Ccdot+%5C%3A1%5Ccdot+%5C%3A20%7D%7D%7B2%5Ccdot+%5C%3A1%7D%3D5)
![x=\frac{-\left(-9\right)-\sqrt{\left(-9\right)^2-4\cdot \:1\cdot \:20}}{2\cdot \:1}=4 x=\frac{-\left(-9\right)-\sqrt{\left(-9\right)^2-4\cdot \:1\cdot \:20}}{2\cdot \:1}=4](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%5Cleft%28-9%5Cright%29-%5Csqrt%7B%5Cleft%28-9%5Cright%29%5E2-4%5Ccdot+%5C%3A1%5Ccdot+%5C%3A20%7D%7D%7B2%5Ccdot+%5C%3A1%7D%3D4)
![x=5,\:x=4 x=5,\:x=4](https://tex.z-dn.net/?f=x%3D5%2C%5C%3Ax%3D4)
D)![x^2+5x=0 x^2+5x=0](https://tex.z-dn.net/?f=x%5E2%2B5x%3D0)
![a=1,\:b=5,\:c=0 a=1,\:b=5,\:c=0](https://tex.z-dn.net/?f=a%3D1%2C%5C%3Ab%3D5%2C%5C%3Ac%3D0)
![x=\frac{-5+\sqrt{5^2-4\cdot \:1\cdot \:0}}{2\cdot \:1}=0 x=\frac{-5+\sqrt{5^2-4\cdot \:1\cdot \:0}}{2\cdot \:1}=0](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-5%2B%5Csqrt%7B5%5E2-4%5Ccdot+%5C%3A1%5Ccdot+%5C%3A0%7D%7D%7B2%5Ccdot+%5C%3A1%7D%3D0)
![x=\frac{-5-\sqrt{5^2-4\cdot \:1\cdot \:0}}{2\cdot \:1}=-5 x=\frac{-5-\sqrt{5^2-4\cdot \:1\cdot \:0}}{2\cdot \:1}=-5](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-5-%5Csqrt%7B5%5E2-4%5Ccdot+%5C%3A1%5Ccdot+%5C%3A0%7D%7D%7B2%5Ccdot+%5C%3A1%7D%3D-5)
![x=0,\:x=-5 x=0,\:x=-5](https://tex.z-dn.net/?f=x%3D0%2C%5C%3Ax%3D-5)
E)![4x^2-16=0 4x^2-16=0](https://tex.z-dn.net/?f=4x%5E2-16%3D0)
![a=4,\:b=0,\:c=-16 a=4,\:b=0,\:c=-16](https://tex.z-dn.net/?f=a%3D4%2C%5C%3Ab%3D0%2C%5C%3Ac%3D-16)
![x=\frac{-0+\sqrt{0^2-4\cdot \:4\left(-16\right)}}{2\cdot \:4}=2 x=\frac{-0+\sqrt{0^2-4\cdot \:4\left(-16\right)}}{2\cdot \:4}=2](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-0%2B%5Csqrt%7B0%5E2-4%5Ccdot+%5C%3A4%5Cleft%28-16%5Cright%29%7D%7D%7B2%5Ccdot+%5C%3A4%7D%3D2)
![x=\frac{-0-\sqrt{0^2-4\cdot \:4\left(-16\right)}}{2\cdot \:4}=-2 x=\frac{-0-\sqrt{0^2-4\cdot \:4\left(-16\right)}}{2\cdot \:4}=-2](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-0-%5Csqrt%7B0%5E2-4%5Ccdot+%5C%3A4%5Cleft%28-16%5Cright%29%7D%7D%7B2%5Ccdot+%5C%3A4%7D%3D-2)
![x=2,\:x=-2 x=2,\:x=-2](https://tex.z-dn.net/?f=x%3D2%2C%5C%3Ax%3D-2)
F)![3x^2-4x=0 3x^2-4x=0](https://tex.z-dn.net/?f=3x%5E2-4x%3D0)
![a=3,\:b=-4,\:c=0 a=3,\:b=-4,\:c=0](https://tex.z-dn.net/?f=a%3D3%2C%5C%3Ab%3D-4%2C%5C%3Ac%3D0)
![x=\frac{-\left(-4\right)+\sqrt{\left(-4\right)^2-4\cdot \:3\cdot \:0}}{2\cdot \:3}= \frac{4}{3}
x=\frac{-\left(-4\right)+\sqrt{\left(-4\right)^2-4\cdot \:3\cdot \:0}}{2\cdot \:3}= \frac{4}{3}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%5Cleft%28-4%5Cright%29%2B%5Csqrt%7B%5Cleft%28-4%5Cright%29%5E2-4%5Ccdot+%5C%3A3%5Ccdot+%5C%3A0%7D%7D%7B2%5Ccdot+%5C%3A3%7D%3D+%5Cfrac%7B4%7D%7B3%7D+%0A)
![x=\frac{-\left(-4\right)-\sqrt{\left(-4\right)^2-4\cdot \:3\cdot \:0}}{2\cdot \:3}=0 x=\frac{-\left(-4\right)-\sqrt{\left(-4\right)^2-4\cdot \:3\cdot \:0}}{2\cdot \:3}=0](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%5Cleft%28-4%5Cright%29-%5Csqrt%7B%5Cleft%28-4%5Cright%29%5E2-4%5Ccdot+%5C%3A3%5Ccdot+%5C%3A0%7D%7D%7B2%5Ccdot+%5C%3A3%7D%3D0)
![x=\frac{4}{3},\:x=0 x=\frac{4}{3},\:x=0](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B4%7D%7B3%7D%2C%5C%3Ax%3D0)
B)
C)
D)
E)
F)
Preguntas similares
hace 6 años
hace 6 años
hace 9 años
hace 9 años
hace 9 años
hace 9 años