Question

Выполни действия:
0,1d(3d^2-3)(3d^2+7)

Answer 1

$0.1d( 3d^{2} -3)( 3d^{2} +7)=0.1d( 9d^{4} + 21d^{2} - 9d^{4} -21)=0.1d(21 d^{2} -21)=0.1d(21 d^{2} -21)=2.1 d^{3} -2.1d=2.1d( d^{2} -1)$