Question

Алгебра 7 класс .......... . .

Answer 1

Ответ:

1. (x+2)(x+11)-2x(3-4x)

x²+11x+2x+22-6x+8x²

9x²+7x+22

2. (a+5)(a-2)+(a-4)(a+6)

a²-2a+5a-10+a²-6a-4a+24

2a²-7a+14

3. (y-9)(3y-1)-(2y+1)(5y-7)

3y²-y-27y+9-(10y²-14y+5y-7)

3y²-y-27y+9-(10y²-9y+7)

3y²-y-27y²+9-10y²+9y+7

-7y²-19y+16

4.(4x-1)×(4x-3)-(2x-10)×(8x+1)

62x+13