Which of the following is a unit of density?

cubic meters
square meters
liters per cubic gram
kilograms per cubic centimeter

The unit of density is:

               Kilograms per cubic centimeter.

We know that the density of a substance is defined as the ratio of the mass of a substance to it's volume.

i.e.

Now, we know that the standard unit of the mass of a substance is: Kilograms(kg)

and the standard unit for a volume is: cubic centimeters(cm³)

Hence, we will get the unit for density as:

            Kilograms per cubic centimeter

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

4.

step-by-step explanation:

it have the same area.brainliest