Simplify (4x^2+3x+9)+(2x^2-5x-9)

$(4 x^{2} + 3 x + 9) + (2 x^{2} - 5 x - 9)$

Step 1

Remove parentheses.

$4 x^{2} + 3 x + 9 + 2 x^{2} - 5 x - 9$

Step 2

Combine the opposite terms in $4 x^{2} + 3 x + 9 + 2 x^{2} - 5 x - 9$ .

Subtract $9$ from $9$ .

$4 x^{2} + 3 x + 2 x^{2} - 5 x + 0$

Add $4 x^{2} + 3 x + 2 x^{2} - 5 x$ and $0$ .

$4 x^{2} + 3 x + 2 x^{2} - 5 x$

Step 3

Add $4 x^{2}$ and $2 x^{2}$ .

$6 x^{2} + 3 x - 5 x$

Step 4

Subtract $5 x$ from $3 x$ .

$6 x^{2} - 2 x$