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16(2x-1)² - 25y²
*it's from chapter factorisation!
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Answer:
4(2x-1)² - (5)²
(8x-4)²- (5)²
a²-b²= ( a-b) (a+b)
(8x-4+5) ( 8x-4-5)
(8x+1) (8x-9)
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