ТатМих

Verified answer

1)

(8a²b+5a²b)-4b²-2+a²b-5b²+2=

13a²b-9b²+a²b=

14a²b-9b²

Ответ: 14a²b-9b²

2)

-2x²y³-9x²y²-4x²y³-12x²y²=

-6x²y³-21x²y²=

-3x²y²(2y+7)

Ответ: -3x²y²(2y+7)