Question

Need help asap

(4x3 + 6x2 + 2x -3) + (3x3 + 3x2 - 5x - 5) = _________________

a. 7x3 + 3x2 + 7x +2

b. 7x3 + 9x2 - 3x - 8

c. 7x3 + 3x2 - 3x - 8

d. 7x6 + 9x4 - 3x2 - 8

Answer 1

b. 7x3 + 9x2 - 3x - 8

Explanation:

Write the problem as a mathematical expression.

(4x3+6x2+2x−3)+(3x3+3x2−5x−5)

Remove parentheses.

4x3+6x2+2x−3+3x3+3x2−5x−5

Add 4x3

and 3x3

.

7x3+6x2+2x−3+3x2−5x−5

Add 6x2

and 3x2

.

7x3+9x2+2x−3−5x−5

Subtract 5x

from 2x

.

7x3+9x2−3x−3−5

Subtract 5

from −3

.

7x3+9x2−3x−8