Question 20

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Jambmaths question: 

Factorize completely$4abx-2axy-12{{b}^{2}}x+6bxy$

Option A: 

$2x(a-3b)(2b-y)$

Option B: 

$2x(3b-a)(2b-y)$

Option C: 

$2x(a-3b)(y-2b)$

Option D: 

$2x(2b-a)(3b-y)$

Jamb Maths Solution: 

$\begin{align}  & 4abx-2axy-12{{b}^{2}}x+6bxy=4abx-12{{b}^{2}}x-2axy+6bxy \\ & 4abx-2axy-12{{b}^{2}}x+6bxy=4bx(a-3b)-2xy(a-3b) \\ & 4abx-2axy-12{{b}^{2}}x+6bxy=2x(b-y)(a-3b) \\\end{align}$

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