Question

Решите уравнение: (8-9у)*у=-40+(6-3у)(6+3у)

Answer 1

(8-9у)*у=-40+(6-3у)(6+3у)
8у-9у²=-40+36-9у²
-9у²+9у²+8у=-40+36
8у=-4
у=-4:8
у=-0,5

Answer 2

(8-9у)*у=-40+(6-3у)(6+3у)
8y-9y²=-40+36-9y²
8y-9y²+9y²=-4
8y=-4
y=-0.5