sammycruz
sammycruz
24-06-2015
Mathematics
contestada
Simplify p(p - q) - q(q - p).
Respuesta :
AceTheGod
AceTheGod
24-06-2015
((p^2)-pq) - ((q^2)-pq)
(p^2) - (q^2) - 2pq
Answer Link
RCTarzan2311
RCTarzan2311
24-06-2015
p(p-q) - q(q-p)
a(b+c) = a(b) + a(c) so...
p(p) + p(-q) - q(q) - q(-p)
p² -pq - q² + qp
a*b = b*a so...
-pq + qp = 0 so...
The answer is...
p² - q²
Answer Link
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