Question

раскройте скобки (c+2)(c-3),(2a-1)(3a+4),(5x-2y)(4x-y),(a-2)(a²-3a+6),(y-y)²,(7x+5)²,(5c-1)(5c+1),(3a+2b)(3a-2b).​

Answer 1

Ответ: вроде так

Объяснение:

Answer 2

Ответ:

$1)(c + 2)(c - 3) = {c}^{2} - 3c + 2c - 6$

$2)(2a - 1)(3a + 4) = 6 {a}^{2} + 8a - 3a - 4 = {6a}^{2} + 5a - 4$

$3)(5x - 2y)(4x - y) = 20 {x}^{2} - 5xy - 8xy + {2y}^{2} = {20x}^{2} - 13xy + {y}^{2}$

$4)(a - 2) ({a}^{2} - 3a + 6) = {a}^{3} - 3 {a}^{2} + 6a - 2 {a}^{2} + 6a - 12 = {a}^{3} - 5 {a}^{2} + 12a - 12$

$5)(y - y) {}^{2} = {y}^{2} - 2y {}^{2} + {y}^{2} = - 2y {}^{2}$

$6)(7x + 5) {}^{2} = 49 {x}^{2} + 70x + 25$

$7)(5c - 1)(5c + 1) = 25 {c}^{2} - 1$

$8)(3a + 2b)(3a - 2b) = (3a - 2b)(3a + 2b) = 9 {b}^{2} - 4 {b}^{2}$