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mina [271]
3 years ago
10

Simplify p(p - q) - q(q - p).

Mathematics
2 answers:
ratelena [41]3 years ago
8 0
P^2-pq-q^2+pq=
p^2-q^2=
(p+q)(p-q)=
ZanzabumX [31]3 years ago
6 0
P(p - q) - q(q - p).    Multiply out.

p*p - p*q - q*q + q*p.         

Note because of the minus before the bracket, the minus inside the bracket changes to +

p² - pq -q² + pq

p² - q² + pq - pq

p² - q² + 0

p² - q²

= p² - q²

I hope this helps.
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