back

When you combine the terms, you get:

5x3      −2x2         x

+3x3      +4x2      −2x

= 8x3      = 2x2     = −x 

and the constant remains 7.

A graph showing 3x to the power of 2. It has the 3 labeled as the coefficient, the x as the variable and the power of 2 as the exponent. A black dotted line. A black dotted line.