Question

(x+5)^2=(x-2)^2+15x +16

Answer 1

x^2 + 10x + 25 = x^2 - 4x + 4 + 15x + 16

25 - 20 = 15x - 14x

x=5

Answer 2

(X+5)^2=(x-2)^2+15x-16
X^2+2•5•x+5^2 =x^2-2•2•x+2^2+15x-16
X^2+10x+25=x^2-4x+4+15x+16
10x+4x-15x=-25+4+15+16
-x=-10. (-1)
X=10