algebraic identity
factorise:
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use a2-b2 = (a+b)(a-b) identity
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64x²- 81y²
(8x)² - (9y)²
(8x-9y)(8x+9y)
Hope it helps you
(8x)² - (9y)²
(8x-9y)(8x+9y)
Hope it helps you
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