Answer:
+ 3d -18
Explanation:
Have you been taught how to do these? Just multiply each term in the first parentheses by each term in the second. Be careful with signs!
So it breaks down like this:
that equation =
+ 15d - 12d -18
Do you see how that worked? 5d times 2d gave us
. Then 5d x 3 gave us 15d. Then you do the same two step using the -6.
Now just combine like terms:
+ (15d - 12d) -18 =
+ 3d -18