Write in Standard Form (8r^2-7r-9)+(-r^2+r)

$(8 r^{2} - 7 r - 9) + (- r^{2} + r)$

Step 1

To write a polynomial in standard form, simplify and then arrange the terms in descending order.

$a x^{2} + b x + c$

Step 2

Subtract $r^{2}$ from $8 r^{2}$ .

$7 r^{2} - 7 r - 9 + r$

Step 3

Add $- 7 r$ and $r$ .

$7 r^{2} - 6 r - 9$