Factorise : a(a − 1)-b(b − 1)
Answers
Answered by
2
Answer:
a(a − 1)-b(b − 1)
a²-a-b²-b
a²-b²-a-b
(a+b)(a-b)-a-b
Answered by
0
Answer:
= (a - b)( a + b - 1)
Step-by-step explanation:
We know that
a² - b² = (a - b) (a + b)
= a(a - 1) - b(b - 1)
= a² - a - b² + b
= a² - b² - a + b
= (a - b)(a + b) - a + b
= (a - b)( a + b - 1)
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