Question 1174997

recall the rule:
When parentheses are preceded by a plus sign + simply remove them.  Nothing changes.

When parentheses are preceded by a minus sign − change the sign of every term within the parentheses. Change + to − and − to + .


{{{(18-2x^3+9x)-(4-x^2-3x^3+11x)}}}

{{{18-2x^3+9x-4+x^2+3x^3-11x}}}

{{{x^3+x^2-2x+14}}}