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2X² + 10X + 12 = 0 donde a= 2; b = 10 c = 12
![X=\frac{-b\pm \sqrt{b^2-4ac}}{2a} X=\frac{-b\pm \sqrt{b^2-4ac}}{2a}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B-b%5Cpm+%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D)
![X=\frac{-10\pm \sqrt{10^2-4(2)(12)}}{2(2)} X=\frac{-10\pm \sqrt{10^2-4(2)(12)}}{2(2)}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B-10%5Cpm+%5Csqrt%7B10%5E2-4%282%29%2812%29%7D%7D%7B2%282%29%7D)
![X=\frac{-10\pm \sqrt{4}}{4} X=\frac{-10\pm \sqrt{4}}{4}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B-10%5Cpm+%5Csqrt%7B4%7D%7D%7B4%7D)
![X=\frac{-10\pm \ 2}{4} X=\frac{-10\pm \ 2}{4}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B-10%5Cpm+%5C+2%7D%7B4%7D)
X1= [-10 + 2]/4 = -2
X2 = [-10 - 2]/4 = -3
2)
X² - 10X + 21 = 0 Donde a = 1; b = -10; c = 21
![X=\frac{-(-10)\pm \sqrt{(-10)^2-4(1)(21)}}{2(1)} X=\frac{-(-10)\pm \sqrt{(-10)^2-4(1)(21)}}{2(1)}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B-%28-10%29%5Cpm+%5Csqrt%7B%28-10%29%5E2-4%281%29%2821%29%7D%7D%7B2%281%29%7D)
![X=\frac{10\pm \sqrt{100-84}}{2} X=\frac{10\pm \sqrt{100-84}}{2}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B10%5Cpm+%5Csqrt%7B100-84%7D%7D%7B2%7D)
![X=\frac{10\pm \sqrt{16}}{2} X=\frac{10\pm \sqrt{16}}{2}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B10%5Cpm+%5Csqrt%7B16%7D%7D%7B2%7D)
![X=\frac{10\pm \ 4}{2} X=\frac{10\pm \ 4}{2}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B10%5Cpm+%5C+4%7D%7B2%7D)
X1 = [10 + 4]/2 = 7
X2 = [10 - 4]/2 = 3
Raices son X = 7 y X = 2
3.) X² + 7X = 0; Donde a = 1; b = 7 c = 0
![X=\frac{-7\pm \sqrt{7^2-4(1)(0)}}{2(1)} X=\frac{-7\pm \sqrt{7^2-4(1)(0)}}{2(1)}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B-7%5Cpm+%5Csqrt%7B7%5E2-4%281%29%280%29%7D%7D%7B2%281%29%7D)
![X=\frac{-7\pm \sqrt{49}}{2} X=\frac{-7\pm \sqrt{49}}{2}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B-7%5Cpm+%5Csqrt%7B49%7D%7D%7B2%7D)
![X=\frac{-7\pm \ 7}{2} X=\frac{-7\pm \ 7}{2}](https://tex.z-dn.net/?f=X%3D%5Cfrac%7B-7%5Cpm+%5C+7%7D%7B2%7D)
X1 = [-7 + 7]/2 = 0
X2 = [-7 - 7]/2 = -7
Raices X = 0 y X = -7
X1= [-10 + 2]/4 = -2
X2 = [-10 - 2]/4 = -3
2)
X² - 10X + 21 = 0 Donde a = 1; b = -10; c = 21
X1 = [10 + 4]/2 = 7
X2 = [10 - 4]/2 = 3
Raices son X = 7 y X = 2
3.) X² + 7X = 0; Donde a = 1; b = 7 c = 0
X1 = [-7 + 7]/2 = 0
X2 = [-7 - 7]/2 = -7
Raices X = 0 y X = -7
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