Question

9+2x (8x-5)=(1-4x)2 решите уравнение

Answer 1

$9+2x (8x-5)=(1-4x)^2 \ 9+16x^2-10x=1^2-2cdot1cdot4x+(4x)^2 \ 9+16x^2-10x=1-8x+16x^2 \ 16x^2-16x^2-10x+8x=1-9 \ -2x=-8 \ x=-8:(-2) \ x=4$