factorise 35y² + 13y -12
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35y²-15y+28y-12=0
5y(7y-3)+4(7y-3)=0
(7y-3)(5y+4)=0
(7y-3)=0 or (5y+4)=0
y=3/7 or y=-4/5
are the sol'n of the given equation
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