Factorise : a (b-a ) - b (a-b)
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Answer:
ab(a+b)
2
−3ab(a+b)
⇒ab[(a+b)
2
−3(a+b)]
⇒
ab(a+b)[a+b−3]
∴
ab(a+b)
2
−3ab(a+b)=ab(a+b)(a+b−3)
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