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