Question
Factorise the following expressions. $2x^2- 2y + 4xy - x$
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Answer
$2x^2- 2y + 4xy - x$
$ = 2x^2- x - 2y + 4xy$
$ = x(2x - 1) - 2y(1 - 2x)$
$ = x(2x - 1) + 2y(2x - 1)$
$ = (2x - 1)(x + 2y)$
$ = 2x^2- x - 2y + 4xy$
$ = x(2x - 1) - 2y(1 - 2x)$
$ = x(2x - 1) + 2y(2x - 1)$
$ = (2x - 1)(x + 2y)$
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