Question

(4y-5) (3y-1) - (2y-7) (6y+7) +54 = 0 помогите это решить

Answer 1

(4y-5) (3y-1) - (2y-7) (6y+7) +54 = 0

12y² - 19y + 5 - 12y² + 28y + 49 + 54 = 0

9y + 108 - 0

9y = -108

y = -108 : 9

y = -12