Question

упростите выражение -4p(8p-6q)+3q(8p-3q)

Answer 1

Ответ:

$-4p(8p-6q)+3q(8p-3q)=-32p^{2} +24pq+24pq-9q^{2} =-32p^{2}+48pq-9q^{2}$Если $p=\frac{1}{2} , q=\frac{1}{3}$ , то

$-32*(\frac{1}{2} )^{2}+48*\frac{1}{2}*\frac{1}{3} -9*(\frac{1}{3} )^{2}=-32*\frac{1}{4}+48*\frac{1}{6} -9*\frac{1}{9} =-\frac{32}{4}+\frac{48}{6}-\frac{9}{9}=-\frac{288}{36}+\frac{288}{36}-1=-1$