factorise: 4x²+4x-15
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4x²+4x-15
= 4x²+(10-6)x-15
= 4x²+10x-6x-15
= 2x(2x+5)-3(2x+5)
= (2x+5)(2x-3)
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Question :-
4x² + 4x - 15
Answer :-
4x² + 4x - 15
= 4x² + (10-6)x - 15
= 4x² + 10x - 6x - 15
= 2x(2x+5) - 3(2x + 5)
= (2x+5)(2x -3)
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