Question
Factorise : $9 a^2+3 a-8 b-64 b^2$
✓
Answer
$(3 a-8 b)(3 a+8 b+1)$
[Hint. Given Exp. $=\left(9 a^2-64 b^2\right)+(3 a-8 b)$ ]
[Hint. Given Exp. $=\left(9 a^2-64 b^2\right)+(3 a-8 b)$ ]
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