Question
Answer
$$7x^2+6x+5-(4x^2+3x+2)=3x^2+3x+3$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}7x^2+6x+5-(4x^2+3x+2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7x^2+6x+5-4x^2-3x-2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3x^2+3x+3\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 4x^2+3x+2 \right) = -4x^2-3x-2 $$ |
| ② | Combine like terms: $$ \color{blue}{7x^2} + \color{red}{6x} + \color{green}{5} \color{blue}{-4x^2} \color{red}{-3x} \color{green}{-2} = \color{blue}{3x^2} + \color{red}{3x} + \color{green}{3} $$ |
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Simplify Rational Expressions