Question

x²–2x+1=4
ajudem me por favor​

Answer 1

Resposta:

$\\x^2-2x+1=4\\x^2-2x=4-1\\\\ x^2-2x-3=0\\\quad x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}\\\frac{-\left(-2\right)+\sqrt{\left(-2\right)^2-4\cdot \:1\left(-3\right)}}{2\cdot \:1} =3\\\frac{-\left(-2\right)-\sqrt{\left(-2\right)^2-4\cdot \:1\left(-3\right)}}{2\cdot \:1}=-1$