4d(2d-9)
a.) 8d-36d
b.) -d
c.) -28d^2
d.) 8d^2-36d
Nope. 4d * -9 = -36d
To simplify the expression 4d(2d - 9), we need to distribute the 4d to both terms inside the parentheses.
First, we multiply 4d by 2d, which gives us 8d^2.
Next, we multiply 4d by -9, which gives us -36d.
Therefore, the simplified expression is:
8d^2 - 36d
So, the correct answer is d.) 8d^2 - 36d.