Question

If a= x+ y and b= x-y , show that (i) (a-b)^2 =4y^2

Answer 1

Step-by-step explanation:

(a - b) ^2 = 4y^2

Taking LHS

{(x + y) - (x - y) }^2

{x + y - x + y}^2

(2y)^2

4y^2

HENCE PROVEN.

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