Question

3a+2d^2-14+6a-4d-2d^2

Answer 1

So 2d^2 and -2d^2 cancel each other out and then that leaves

3a-14+6a-4d collect like terms

9a-14-4d

And that’s the answer

Answer 2

Collect like terms:
(3a+6a)+(2d^2-2d^2)-14-4d

Then simplify and you get:
9a-14-4d