Factorize : (a) 3(x+2)²+17(x+2)+10 (b) 4x²-9y²+20x+25
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Step-by-step explanation:
3(x+2)²+17(x+2)+10
=3(x³+4+4x)+17x+34+10=0
=3x²+12+12x+17x+44=0
=3x²+29x+56=0
=3x²+21x+8(x+7)=0
=(3x+8(x+7)=0
[x=-8/3 8x=-7]
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