Question

Срочно решите даю 100 баллов пожалуйста

Answer 1

Пошаговое объяснение:

$1) {b}^{2} {m}^{2} - 16 {b}^{2} = {b}^{2} (m + 4)(m - 4) \\ {7n}^{3} + {7m}^{3} = 7(n + m)( {n}^{2} - nm + {m}^{2} ) \\ {5a}^{2} - 30a + 45 = 5(a - 3 {)}^{2} \\ {y}^{8} - {x}^{4} = ( {y}^{4} + {x}^{2} )( {y}^{2} + x)( {y}^{2} - x)$

$2)21x - 7xy + 21y - {7y}^{3} = 7(3 - y)(x + y) \\ {a}^{2} - 10a + 25 - {4p}^{2} = (a - 5 + 2p)(a - 5 - 2p) \\ {4b}^{2} + 2b + c - {c}^{2} = 4 {b}^{2} + 2b + c - {c}^{2}$

$3) \: {7y}^{3} + 35 {y}^{2} = 0 \\ {7y}^{2} (y + 5) = 0 \\ {y}^{2} (y + 5) = 0 \\ {y}^{2} = 0 \: \: or \: \: y + 5 = 0 \\ y = 0 \: \: or \: \: y = - 5$