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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