Question

X В квадрате + 4x =5 срочно

Answer 1

$x^{2} +4x=5 \\ \\ x^{2} +4x-5=0 \\ \\ D=16+20=36 \\ \\ \sqrt{D} =6 \\ \\ x_{1} = \frac{-4+6}{2}= \frac{2}{2} =1 \\ \\ x_{2} = \frac{-4-6}{2} =- \frac{10}{2} =-5$