Question

How to verify (a-b)²=a²+b²+2ab by
placing cube method​

Answer 1

Answer:

We know that (a-b) ^2 =a^2 +b^2 - 2ab

Taking LHS

= ( a-b) ^2

We can write it

=( a-b) (a-b)

Multiply by two binomial then

a(a-b) - b(a-b)

=a^2 - ab-ab+b^2

Like it as

a^2 +b^2 - 2ab

So it be proved

Answer 2

Answer:

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