5. Factorise :
(1) 4ax2 + 12ax + 9a
(2) 25b²x²+90b²x+81b²
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1. 4ax2 + 6ax + 6ax + 9a
2ax (2x + 3 ) + 3a (2x + 3)
so , (2x+3) (2ax+3a)
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