Question

6x^2+2x-9=4x^2-6x-9 (8 класс)

Answer 1

$6x^{2}+2x-9=4x^{2}-6x-9\\6x^{2}+2x-9-4x^{2}+6x+9=0\\2x^{2}+8x=0\\x^{2}+4x=0\\x(x+4)=0\\x_{1} =0\\x+4=0\\x_{2}=-4$

Ответ : - 4 ; 0