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How to solve this maths problem a^2-2ax+x^2-4b^2

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1 Answer

(a ± b)2 = a2 ± 2ab + b2
a2 - b2 = (a - b)(a + b)
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a2 - 2ax + x2 - 4b2 = (a2 - 2ax + x2) - (2b)2 = (a -x)2 - (2b)2 = (a - x - 2b)(a - x + 2b)

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