Question

factorise the above algebraic expression
quick....
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Answer 1

✪ANSWER✪

1. $(b + 1)(ab - 1)$
2. $(x - a)(x - 2b)$

★FACTORIZATION★

$1. \: \: a {b}^{2} + (a - 1)b - 1$

$= a {b}^{2} + ab - b - 1$

$= ab(b + 1) - 1(b + 1)$

$= (b + 1)(ab - 1)$

$2. \: \: {x}^{2} - x(a + 2b) + 2ab$

$= {x}^{2} - ax - 2bx + 2ab$

$= x(x - a) - 2b(x - a)$

$= (x - a)(x - 2b)$