Question

Срочно пожалуйста, помогите

Answer 1

$1.5a( {a}^{2} - 25{b}^{2} ) = 5a((a - 5b)(a + 5b)) \\ 2.(a - b)(a + b) - 5(a + b) \\ 3. {(a - b)}^{2} - c(a + b) \\ 4. {(5a + 7b)}^{2} \\ 5.{(a - b)}^{2} - 3(a + b) \\ 6.7ab(9 {b}^{2} - a)$

$7. {b}^{2} - {c}^{2} - {b}^{2} - bc = - {c}^{2} - bc = - c(c - b) \\ 8. {(m + 3n)}^{2} - m - 3n = m - 3n \\ 10.4a( {a}^{2} - {b}^{2} )$