Question

factorize a-b -9a^2+ 9b^2

Answer 1

HERE IS YOUR ANSWER..⬇⬇

$\underline{SOLUTION}$ ➡

$a - b - 9a {}^{2} + 9b {}^{2} \\ \\=( a - b)-9(a {}^{2} -b {}^{2} ) \\ \\ =( a -b)-9(a+b)(a-b)\\ \\=(a-b)[1-9(a+b)] \\ \\ = (a-b) (1-9a-9b)$
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Answer 2

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