Mathematics
Simplify:
(px - q) (px + q)
Algebraic Expressions
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Answer
(px - q) (px + q)
= px (px + q) - q (px + q)
= p(1+1)x(1+1) + pqx - pqx - q(1+1)
= p2x2 + pqx - pqx - q2
= p2x2 - q2
Hence, (px - q) (px + q) = p2x2 - q2
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