The answer would be letter b
The only thing you need to do is divide 56 by -7. You know the d must be a negative number because negative x negative= positive. So 56 / -7 is -8.
60
30 *2
15 * 2 * 2
5 * 3 * 2 * 2
Divide them
We'd get
2n^2+1/10n + 1
Four times the sum of x and two
