Question

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

Answer 1

2r ^2 +61+3x

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