Question

Решите уравнение (x-1)²+7=(x+4)²

Answer 1

$(x-1)^2+7=(x+4)^2\\x^2-2x+1+7=x^2+8x+16\\-2x+1+7=8x+16\\-2x+8=8x+16\\-2x-8x=16-8\\ -10x=8 \;\;\;|:-10\\\boxed{x=-0,8}$

Answer 2

(x-1)²+7=(x+4)²
x^2 - 2x + 1 + 7 = x^2 + 8x + 16
-10x = 8
x = -8/10