a(a-1)-b(b-1) factorise difference of two squares pls
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Answer:
(a-b)[a+b-1] is the answer
Step-by-step explanation:
a(a-1)-b(b-1)
=a^2-a-b^2-b
=a^2-b^2-a+b
=( a+b ) (a-b) (a-b) [a^2-b^2=(a+b) (a-b)
=(a-b) [( a+b)-1]
=(a-b) [a+b-1]
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