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06-11-2020
Mathematics

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The sum of 3r2 + 58 - 6 and -r2 + 3x + 9 is?

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06-11-2020

Answer:

2r ^2 +61+3x

Step-by-step explanation:

1 Collect like terms.

(3{r}^{2}-{r}^{2})+(58-6+9)+3x(3r

2

−r

2

)+(58−6+9)+3x

2 Simplify.

2{r}^{2}+61+3x2r

2

+61+3x

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