Pre-Algebra Examples

$- 3 x + x^{3} - 2 x^{2}$ and $4 x^{3} - 2 x^{2} - 4 x$

Step 1

Add the expressions.

$- 3 x + x^{3} - 2 x^{2} + 4 x^{3} - 2 x^{2} - 4 x$

Step 2

Subtract $4 x$ from $- 3 x$ .

$x^{3} - 2 x^{2} + 4 x^{3} - 2 x^{2} - 7 x$

Step 3

Add $x^{3}$ and $4 x^{3}$ .

$5 x^{3} - 2 x^{2} - 2 x^{2} - 7 x$

Step 4

Subtract $2 x^{2}$ from $- 2 x^{2}$ .

$5 x^{3} - 4 x^{2} - 7 x$