Question 12

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waecmaths question: 

Factorize $5{{y}^{2}}-2ay-3{{a}^{2}}$

Option A: 

$(a-y)(5y-3a)$

Option B: 

$(y-a)(5y-3a)$

Option C: 

$(y-a)(5y+3a)$

Option D: 

$(y+a)(5y-3a)$

waecmaths solution: 

$\begin{align}  & 5{{y}^{2}}-2ay-3{{a}^{2}}=5{{y}^{2}}-5ay+3ay-3{{a}^{2}} \\ & =5y(y-a)+3a(y-a) \\ & =(5y+3a)(y-a) \end{align}$

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