Question

2. The volume of a cube is x+3x2+3x + K.If its length is x+1, find K.​

Answer 1

GIVEN , X + 1 = 0

==> X= -1

GIVEN ==> X³+3X²+3X+K

SUBSTITUTING THE VALUE OF X IN EQ(1)

==> (-1)³ + 3(-1)² +  3(-1)  + K

==> -1 + 3 -3 +K

==> -1+K =0

==> K = 1