Question 623035
{{{(1.3x^3+4.6x^2-3.3x)-(-4.2x^3-4.2x^2+18)}}} Remove the parentheses and simplify.
{{{1.3x^3+4.6x^2-3.3x+4.2x^3+4.2x^2-18}}} Combine like-terms.
{{{5.5x^3+8.8x^2-3.3x-18}}}