Question

factorise: 25(2x+y)^2-16(x-y)^2

Answer 1

ans in the attachment....hope it helps uh....
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Answer 2

25(2x+y)²-16(x-y)²

25((2x)²+2(2x)(y)+(y²) - 16(x² - 2xy +y²)

25(4x²+4xy +y²) -16x² + 32xy -16y²

100x² + 100xy + 25y² -16x²+32xy - 16y²

84x² + 132xy +9y²

84x² +6xy+ 126xy + 9y²

6x ( 14x + y) + 9y( 14x+ y)

(6x+ 9y)(14x+y)