Question

(a - b) ^ 2 = (a + b) ^ 2 - 4ab
prove it




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Answer 1

Answer:

We have,

(a+b)

2

=a

2

+2ab+b

2

(1) and (a−b)

2

=a

2

−2ab+b

2

(2).

Now subtracting (2) from (1) we get,

(a+b)

2

−(a−b)

2

=4b