Question

What is p2+q2 formula?

Answer 1

Answer:

(p+q)^2=p^2+q^2+2pq

p^2+q^2=(p+q)^2-2pq

hope it helps

Answer 2

Given : $p^2+q^2$

To find : Formula

Solution:

The formula for $p^2+q^2$ is

$p^2+q^2 = (p+q)^2 -2pq$

or

$p^2+q^2 = (p-q)^2+2pq$

proof :

$p^2+q^2 = (p+q)^2 -2pq\\\\RHS\\\\p^2+2pq+b^2-2pq\\\\p^2+q^2\\\\LHS$

hence LHS = RHS

thus , The formula is $p^2+q^2 = (p+q)^2 -2pq$

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