Question

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Answer 1

$1. 3a + 12b = 3(a + 4b)$

$2. 2a + 2b + {a}^{2} + ab = 2(a + b) + a(a + b) = (a + b)(2 + a)$

$3. 9 {a}^{2} - 16b^{2} = (3 - 4b)(3a + 4b)$

$4. 7 {a}^{2} b - 14a {b}^{2} + 7ab = 7ab(a - 2b + 1)$

$5. {m }^{2} + mn - m - mg - ng + g = m(m + n - 1) - g(m - n + 1) =( m + n - 1)(m - g)$

$6. 4 {a}^{2} - 4 ab + {b}^{2} = (2a - b {)}^{2}$

7. 2(3a²+bc)+a(4b+3c)=6a²+2bc+4ab+3ac

8. 25а²+70аb+49b²=(5a+7b)²