Question

(x+4)(y-5) (x-8)(6-y) (-10-x)(y+3) (-2-y)(x-9) (5+a)(-a-2) (-a-1)(a-7) (2x-3y)(x+2y) (12a+11)(-10-5a)

Answer 1

Ответ:

ху-5х+4у-20

6Х-ХУ- 48+8у

-10у-30-ху-3х

-2х+18-ху+9 у

Answer 2

Let's simplify each expression one by one:

1. (x+4)(y-5) Expanding this expression, we get: xy + 4y - 5x - 20

2. (x-8)(6-y) Expanding this expression, we get: 6x - xy - 8y + 48

3. (-10-x)(y+3) Expanding this expression, we get: -10y - xy + 3x + 30

4. (-2-y)(x-9) Expanding this expression, we get: -2x + 9y + xy - 18

5. (5+a)(-a-2) Expanding this expression, we get: -2a - 10 - a^2 - 5a

6. (-a-1)(a-7) Expanding this expression, we get: -7a - a^2 + a + 7

7. (2x-3y)(x+2y) Expanding this expression, we get: 2x^2 + 4xy - 3xy - 6y^2

8. (12a+11)(-10-5a) Expanding this expression, we get: -120a - 60a^2 - 110 - 55a

So, after expanding each expression, we have:

1. (x+4)(y-5) = xy + 4y - 5x - 20
2. (x-8)(6-y) = 6x - xy - 8y + 48
3. (-10-x)(y+3) = -10y - xy + 3x + 30
4. (-2-y)(x-9) = -2x + 9y + xy - 18
5. (5+a)(-a-2) = -2a - 10 - a^2 - 5a
6. (-a-1)(a-7) = -7a - a^2 + a + 7
7. (2x-3y)(x+2y) = 2x^2 + 4xy - 3xy - 6y^2
8. (12a+11)(-10-5a) = -120a - 60a^2 - 110 - 55a