Question

Add: p(p+q) and q(q-p)​

Answer 1

$\huge\tt\purple{Answer:}$

$= p(p + q) + q(q - p)$

$= {p}^{2} + \cancel{pq}+ {q}^{2} - \cancel{qp}$

$= {p}^{2} + {q}^{2}$ (answer)

Answer 2

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

Answer : p^2+q^2