Answer
$$6-3xx\cdot2-4=-6x^2+2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}6-3xx\cdot2-4& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6-6x^2-4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-6x^2+2\end{aligned} $$ | |
| ① | $$ 3 x x \cdot 2 = 6 x^{1 + 1} = 6 x^2 $$ |
| ② | Combine like terms: $$ \color{blue}{6} -6x^2 \color{blue}{-4} = -6x^2+ \color{blue}{2} $$ |
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