Question

13. Умножьте многочлен на многочлен.
1) (4x + 11) (-5x3 + 2x² - 4x + 7)
3) (2x3 - 11x² + 7x - 3) (4x + 3)
5) (7x² - 4x - 5) (-2x² + 3x - 11)
7) (-3x + 13) (2x³ - 2x² + 5x -11)
9) (-5x³ - 2x² + 4x - 11) (3x + 2)
2) (9a² + ab - 5b²) (-2a-3b)
4) (-2a² + 5ab + 3b²) (3а-5b)
6) (3a² + 5ab - 11b²) (2а + 7b)
8) (-5a² - 7ab + 9b²) (a-5b)
10) (a² - 7ab + 11b² ) (3а - 7b)

ПОМОГИТЕ ПОЖАЛУЙСТА ДАМ 20 БАЛЛОВ​

Answer 1

Ответ:

1)-68x²-159x+77

3)-44x³+19x²+27x-9

5)-14x⁴+29x³-79x²+29x+55

7)-6x³+17x²+72x-143

9)-15x⁴-16x³+8x²-25x-22

Answer 2

Ответ:

1)

$(4x + 11)( - 5x {}^{3 } + 2x {}^{2} - \\ - 4x + 7) = \\ = - 20x {}^{4 } + 8x {}^{3} - 16x {}^{2} + 28x - 55x {}^{3} + 22x {}^{2} - 44x + 77 = \\ = - 20x {}^{4} - 46x {}^{3} + 6x {}^{2} - 16x + 77$

3)

$(2x {}^{3} - 11x {}^{2} + 7x - \\ - 3)(4x + 3) = \\ = 8x {}^{4} + 6x {}^{3} - 44x {}^{3} - 33x {}^{2} + 28x {}^{2} + 21x - 12x - 9 = \\ = 8x {}^{4} - 38x {}^{3} - 5 {}^{2} + 9x - 9$

5)

$(7x {}^{2} - 4x - 5)( - 2 {x}^{2} + \\ + 3x - 11) = \\ = - 14x {}^{4} + 21x {}^{3} - 77x {}^{2} + 8x {}^{3} - 12x {}^{2} + 44x + 10x {}^{2} - 15x + 55 = \\ = - 14x {}^{4} + 29x {}^{3} + 79x {}^{2} + 29x + 55$

7)

$( - 3x + 13)(2x {}^{3} - 2x {}^{2} + \\ + 5x - 11) = \\ = - 6x {}^{4} + 6x {}^{3} - 15 {}^{2} + 33x + 26x {}^{3} - 26x {}^{2} + 65x - 163 = \\ = - 6x {}^{4} + 32x {}^{3} - 41x {}^{2} + 98x - 163$

9)

$( - 5x {}^{3} - 2x {}^{2} + 4x - \\ - 11)(3x + 2) = \\ = - 15x {}^{4} - 10x {}^{3} - 6x {}^{3} - 4x {}^{2} +12x {}^{2} + 8x - 33x - 22 = \\ = - 15x {}^{4} - 16x {}^{3} + 8x {}^{2} - 25x - 22$

2)

$(9a {}^{2} + ab - 5b {}^{2} )( - 2a - \\ - 3b) = \\ = - 18a {}^{3} - 27a {}^{2} b - 2a {}^{2} b - 3ab {}^{2} + 10ab {}^{2} + 15b {}^{3} = \\ = - 18a {}^{3} - 29a {}^{2} b + 7ab {}^{2} + 15b {}^{3}$

4)

$( - 2a {}^{2} + 5ab + 3b {}^{2} )(3a - \\ - 5b) = \\ = - 6a {}^{3} + 10a {}^{2} b {}^{2} + 15a {}^{2} b - 25ab {}^{2} + 9ab {}^{2} - 15b {}^{3} = \\ = - 6a {}^{3} + 10a {}^{2} b {}^{2} + 15a {}^{2} b - 16ab {}^{2} - 15b {}^{3}$

6)

$(3a {}^{2} + 5ab - 11b {}^{2} )(2a + \\ + 7b) = \\ = 6a {}^{3} + 21a {}^{2} b + 10a {}^{2} b + 35ab {}^{2} - 22ab {}^{2} - 77b {}^{3} = \\ = 6a {}^{3} + 31a {}^{2} b - 13ab {}^{2} - 77b {}^{3}$

8)

$( - 5a {}^{2} - 7ab + 9b {}^{2} )(a - \\ - 5b) = \\ = - 5a {}^{3} + 25a {}^{2} b - 7a {}^{2} b + 35ab {}^{2} + 9ab {}^{2} - 45b {}^{3} = \\ = - 5a {}^{3} + 17a {}^{2} b + 44ab {}^{2} - 45b {}^{3}$

10)

$(a {}^{2} - 7ab + 11b {}^{2} )(3a - \\ - 7b) = \\ = 3a {}^{3} - 7a {}^{2} b - 21a {}^{2} b + 49ab {}^{2} + 33ab {}^{2} - 77b {}^{3} = \\ = 3a {}^{3} - 28a {}^{2} b + 82ab {}^{2} - 77b {}^{3}$