Question

x2-4x+4=0 ecuacion con formula general cuanto da?

Answer 1

Las 2 raìces son iguales. Cada una es igual a 2

Answer 2

SOLUCIÓN

♛ HØlα!! ✌

                       $Sea\:la\:ecuaci\'on\:cuadr\'atica:\\\\\\ax^2+bx+c=0\\\\\\Por\:f\'ormula\:general\:tenemos\:que:\\\\\\\mathrm{\boxed{x_{1,2}=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}}}\\\\\\Del\:problema:\\\\\\a=1,b=-4,c=4\\\\\\ Entonces\:reemplazamos\\\\\\x_{1,2}=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}\\\\\\x_{1,2}=\dfrac{-(-4)\pm \sqrt{(-4)^2-[4(1)(4)]}}{2(1)}\\\\\\x_{1,2}=\dfrac{4\pm \sqrt{16-(16)}}{2}\\\\\\x_{1,2}=\dfrac{4\pm \sqrt{0}}{2}\\\\\\x_{1,2}=\dfrac{4\pm0}{2}$

                    $\Rightarrow\:x_{1}=\dfrac{4+0}{2}\\\\\\x_{1}=\dfrac{4}{2}\\\\\\\boxed{\boldsymbol{x_{1}=2}}\\\\\\\Rightarrow\:x_{2}=\dfrac{4-0}{2}\\\\\\x_{2}=\dfrac{4}{2}\\\\\\\boxed{\boldsymbol{x_{2}=2}}$