Question

5c^2d*(-2cd^2-3c^2d). обчисліть при c= -1 d =1

Answer 1

$5c^2d*(-2cd^2-3c^2d)=-10c^3d^3-15c^4d^2$
при с=-1 d=1
$-10c^3d^3-15c^4d^2=-10*(-1)^3*1^3-15*(-1)^4*1^2= \\ =-10*(-1)*1-15*1*1=10-15=-5$