Question

срочно!!!!!!!!!!!!!!!!!!!!​

Answer 1

1.

$1) {m}^{3} +( 5 {n)}^{3} = (m + 5n) \\ ( {m}^{2} - 5mn + 25 {n}^{2} )$

$2)x( {y}^{2} - 16x {}^{2}) = \\ x(y - 4x)(y + 4x) \\ 3) - 5( {x}^{2} - 6x + 9) = \\ - 5(x - 3) {}^{2}$

$4)7y(x + 2) - 42(x + 2) = \\ (x + 2)(7y - 42) \\ 5)(100 - {c}^{2} )(100 + {c}^{2} )$

2.

$b( {b}^{2} - 9) - ( {b}^{3} + {b}^{2} + b - {b}^{2} - b \\ - 1) = \\ {b}^{3} - 9b - {b}^{3} + 1 = - 9b + 1$

3.

$1)(9c - d)(9c + d) + 1(9c + d) = \\ (9c + d)(9c - d + 1) \\ 2)(a + 4b) {}^{2} - 1 = \\ (a + 4b - 1)(a + 4b + 1)$

Остальное не знаю