Factorise (5x+4y)²-(3x-2y)² – InterviewSolution

1.	Factorise (5x+4y)²-(3x-2y)²
Answer» (5x+4y)²-(3x-2y)²using IDENTITY- a²-b²=(a+b)(a-b) (5x+4y)²-(3x-2y)² = (5x+4y+3x-2y)(5x+4y-3x+2y) = 8x+2y × 2x+6y = 16x²+4xy + 48xy+12y² = 16x²+12y²+52xy

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