Question

identify the terms and like terms in the expression. -x - 9x² + 12x² + 7

Explanation:

Step1: Recall definition of terms

Terms in an algebraic expression are separated by plus or minus signs. In the expression $-x - 9x^{2}+12x^{2}+7$, the terms are $-x$, $- 9x^{2}$, $12x^{2}$, and $7$.

Step2: Recall definition of like - terms

Like - terms have the same variable(s) raised to the same power(s). The like - terms here are $-9x^{2}$ and $12x^{2}$ since they both have the variable $x$ raised to the power of $2$.

Answer:

Terms: $-x,-9x^{2},12x^{2},7$; Like terms: $-9x^{2},12x^{2}$