factorise 49a⁶ - 56a³xy² + 16x²y⁴
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Answer:
49a⁶-56a³xy²+16x²y⁴
by using the property
(a-b)²=a²-2ab+b²
=(7a³)²-2(7a³)(4xy²)+(4xy²)²
=(7a³-4xy²)²
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