factorise 25x²-121y⁴
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Using the identity a²-b²= (a+b)(a-b)
(5x-11y²)(5x+11y²)
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Answer:
(5x-11y²)(5x+11y²)
Step-by-step explanation:
25x²-121y⁴
(5x)²-(11y²)
= Using (a)²-(b)²= (a-b)(a+b)
a= 5x , b= 11y²
= (5x-11y²)(5x+11y²)
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