(x+10)^2=(x-9)^2 решение

Question

(x+10)^2=(x-9)^2 решение

Answer 1

X^2+20x+100=x^2-18x+81;x^2-x^2+20x+18x=81-100;38x=19;x=0,5

Answer 2

X^2+20x+100=x^2+18x-81
x^2-x^2+20x-18x+100+81=0
2x=-181
x=-90.5