Question

как решить уравнение (9-в)*(в+9)+(4-в)2=0

Answer 1

(9 - b)(9 + b) + (b - 4)^2 = 0
81 - b^2 + b^2 - 8b + 16 = 0
81 - 8b + 16 = 0
- 8b = - 97
8b = 97
b = 97/8
b = 12,125