Question

Select the correct difference.

5d^2 + 4d - 3 less 3d^2 - 2d + 4


2d^2 + 2d + 1
2d^2 + 6d - 7
2d^2 + 6d + 7
-2d^2 - 6d + 1

Answer 1

5d^2 + 4d - 3 - (3d^2 - 2d + 4) -- distribute through the parenthesis
5d^2 + 4d - 3 - 3d^2 + 2d - 4
now just combine like terms
5d^2 - 3d^2 = 2d^2
4d + 2d = 6d
-3-4 = -7
putting it all together and we have : 2d^2 + 6d - 7