Question

Решите уравнение:
(4-x)*(x+5)+x²=0

Answer 1

(4-x)(5+x)+x^2=0
4x+20-x^2-5x+x^2=0
-x+20=0
-x=-20
x=20

Answer 2

4x+20-x^2-5x+x^2=0
-x=-20
X=20