Question

Раскрыть скобки. Пожалуйстаааа

Answer 1

7(x-5-y)=7x-35-7y

12(x+1)=12x+12

-1(-x-5)=x+5

12y(y-x)=12y²-12xy

(x-4)(y+5)=xy+5x-4y-20

(x-10)(x+9)=x²+9x-10x-90=x²-x-90

(a-b)(a-b)=a²-ab-ab+b²=a²-2ab+b²

(19-y)(y-19)=19y-361-y²-19y=-y²-361

Answer 2

7(x-5-y)=7x-35-7y
12(x+1)=12x+12
-1(-x-5)=x+5
12y(y-x)=12y^2-12xy
(x-4)(y+5)=xy+5x-4y-20
(x-10)(x+9)=x^2+9x-10x-90=x^2-x-90
(a-b)(a-b)=a^2-ab-ab+b^2=a^2-2ab+b^2
(19-y)(y-19)=19y-361-y^2+19y=-y^2+38y-361