Question

This is confusing me I'd appreciate some help

Answer 1

d equals to -3, so in every expression we substitute d with -3.

2d(-3d)

2(-3) x (-3x-3)

-6 x 9 = -54

12d - 28

12(-3) - 28

-36-28 = -64

-3d

-3x(-3) = 9

-5d-8

-5x(-3)-8

15-8 = 7

8d+14

8x(-3) + 14

-24 + 14 = -10

hope it helps.