Question
Answer
$$2x^2+5x-9-(-3x+5)=2x^2+8x-14$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}2x^2+5x-9-(-3x+5)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2x^2+5x-9+3x-5 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}2x^2+8x-14\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( -3x+5 \right) = 3x-5 $$ |
| ② | Combine like terms: $$ 2x^2+ \color{blue}{5x} \color{red}{-9} + \color{blue}{3x} \color{red}{-5} = 2x^2+ \color{blue}{8x} \color{red}{-14} $$ |
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