Question

How do you simplify `(2r ^ { 2} + 8) + ( 1- 5r ^ { 4} + 3r ^ { 2} )`?

Answer 1

`-5r^4+5r^2+9`

Explanation:

`(2r^2+8)+(1-5r^4+3r^2)`

`:.=2r^2+8+1-5r^4+3r^2`

`:.=-5r^4+5r^2+9`