Question

Умножение многочлена на многочлен
1) (x+y)(x-y)
2) (x+2)(y-6)
3) (4-a)(5-b)
4) (a-2)(3-a)
5) (2x-1)(3+4x)

1. 4x-(x-1)(x+3)
2. a²-(a+b)(a-2b)
3. 20+(4-x)(x-5)
4. (3x-5)(x+1)-3x²
5. (-4x+6)(-x-2)-4x²​

Answer 1

$1) {x}^{2} - {y}^{2} \\ 2)xy + 2y - 6x - 12 \\ 3)20 - 5a - 4b + ab \\ 4)3a - 6 - {a}^{2} + 2a \\ 5)6x - 3 + 8 {x }^{2} - 4x \\ 1)4x - {x}^{2} + x - 3x + 3 = \\ 2x - {x}^{2} + 3 \\ 2) {a}^{2} - {a}^{2} - ab + 2ab + 2 {b}^{2} = \\ ab + 2 {b}^{2} \\ 3)20 + 4x - {x}^{2} - 20 + 5x = \\ 9x - {x}^{2} \\ 4)3 {x}^{2} - 5x + 3x - 5 - 3 {x}^{2} = \\ - 2x - 5 \\ 5)4 {x}^{2} - 6x + 8x - 12 - 4 {x}^{2} = \\ 2x - 12$

Answer 2

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