Question

Решите уравнения по алгебре

Answer 1

$1) x^{4} -25 x^{2} =0 \ x^{2} ( x^{2} -25)=0 \ x^{2} =0to x=0 \ x^{2} -25=0 \ x^{2} =25 \ x=+-5$

$2)frac{ x^{2} +5x-6}{x+1} =0 \ x^{2} +5x-6=0 \ D=25+24=49 sqrt{D} =7 \ x_{1} = frac{-5+7}{2} = frac{2}{2} =1 \ x_{2} = frac{-5-7}{2} =- frac{12}{2} =-6 \ x+1 neq 0 \ x neq -1$