Question

Помогите срочно!Заранее спасибо

Answer 1

Ответ:

1) (5x²+8x-7)-(2x²-2x-7) = 5x²+8x-7-2x²+2x+7 = 3x²+10x

2) 2(2x-3)+(-2x²-5x-18) = 4x-6-2x²-5x-18 = -x-24-2x²

3) (6a²-3a+11)-(-3a-a²+7) = 6a²-3a+11+3a+a²-7 = 7a²-4

4) (14xy-9x²-3y²)-(-3x²+5xy-4y²) = 14xy-9x²-3y²+3x²-5xy+4y² = 9xy-6x²+y²

5) (7ab-15ab+3a²b)+(30ab-8a²b) = 7ab-15ab+3a²b+30ab-8a²b = 22ab-5a²b