(6+9)(b+8)+(4-b)²=0?

Question

(6+9)(b+8)+(4-b)²=0?

Answer 1

(6+9)(b+8)+(4-b)^2=0
15(b+8)+16-8b+b^2=0
15b+120+16-8b+b^2=0
7b+136+b^2=0
b^2+7b+136=0
b не равно 0