Question

4b(b-3b-3); (x-3)(2x+5); (6c+d)(8c-5d) (a+1)(a-2a-8)

Answer 1

4b(b-3b-3)= 4bквадрат-12bкаадрат-12b

Answer 2

Ответ:

1) 16b³

2) -15×2x²

3) -48c-5d²

4) -9×2a³

Answer 3

Let's simplify each of the given expressions:

1. 4b(b - 3b - 3): Distributing the multiplication: = 4b(b) - 4b(3b) - 4b(3) = 4b^2 - 12b^2 - 12b Combining like terms: = -8b^2 - 12b

2. (x - 3)(2x + 5): Distributing the multiplication: = (x)(2x) + (x)(5) - (3)(2x) - (3)(5) = 2x^2 + 5x - 6x - 15 Combining like terms: = 2x^2 - x - 15

3. (6c + d)(8c - 5d): Distributing the multiplication: = (6c)(8c) + (6c)(-5d) + (d)(8c) + (d)(-5d) = 48c^2 - 30cd + 8cd - 5d^2 Combining like terms: = 48c^2 - 22cd - 5d^2

4. (a + 1)(a - 2a - 8): Simplifying the expression inside the parentheses: = (a + 1)(-a - 8) Distributing the multiplication: = (a)(-a) + (a)(-8) + (1)(-a) + (1)(-8) = -a^2 - 8a - a - 8 Combining like terms: = -a^2 - 9a - 8

Therefore, the simplified expressions are:

1. -8b^2 - 12b
2. 2x^2 - x - 15
3. 48c^2 - 22cd - 5d^2
4. -a^2 - 9a - 8