Question

$(p - q) \times (p + q) + (q - r) \times (q + r)$
Pls answer

pls ​

Answer 1

$\huge⚘ \bf \ \red{Answer}$

$(p - q) \times (p + q) + (q - r) \times (q + r)$

$\cancel {(p - q)} \times \cancel{ (p + q)} + \cancel{(q - r)} \times \cancel {(q + r)} \\ = 1 + 1 \\ = 2$