Question

Simplify by using algebraic identities
$(p + q) {}^{2} - (p - q) {}^{2}$
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Answer 1

Answer:

hope it helps.....................

Answer 2

$\huge{\mathcal{\underline{\purple{Answer}}}}$

$(p + q) {}^{2} - (p - q) { }^{2} \\ (p + q + p - q)(p + q - (p - q) \\ (2p)(p + q - p + q) \\ (2p)(2q)$

$\huge{\mathcal{\underline{\purple{=4pq}}}}$

Identity used :

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