Factorise:a-b-a²+b²
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Answer:
a-b-(a+b)(a-b-)
a-b-a-b×a+b
-ab
Step-by-step explanation:
a-b-a²+b²
=1(a-b)-(a²-b²)
=1(a-b)-(a+b)(a-b)
=(a-b)(1-a-b)