Question

factorise 99x²-202xy+99y².
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Answer 1

Answer:-

Now,

99x2−202xy+99y2

99x2−202xy+99y2=100x2−200xy+100y2−(x2+2xy+y2)

=(10x−10y)2−(x+y)2

=(10x−10y)2−(x+y)2=(9x−11y)(11x−9y).