waecmaths question:
Factorize completely $6ax-12by-9ay+8bx$
Option A:
$(2a-3b)(4x+3y)$
Option B:
$(3a+4b)(2x-3y)$
Option C:
$(3a-4b)(2x+3y)$
Option D:
$(2a+3b)(4x-3y)$
waecmaths solution:
$\begin{align} & 6ax-12by-9ay+8bx=6ax+8bx-12by-9ay \\ & 6ax-12by-9ay+8bx=2x(3a+4b)-3y(4b+3a) \\ & 6ax-12by-9ay+8bx=(3a+4b)(2x-3y) \\\end{align}$
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