Answer:
B) -18
Step-by-step explanation:
To find the missing coefficient, we have to multiply (2d - 5)(2d -4) using FOIL method.
FOIL method is used to multiply two binomials.
F- Multiply the first terms of each binomials
O-Multiply the outer terms
I- Multiply the inner terms
L-Multiply the last terms
(2d - 5)(2d - 4) = (2d)(2d) +2d(-4) -5(2d) -5(-4)
Simplifying this, we get
4d^2 -8d -10d + 20
Simplify the like terms, we get
4d^2 -18d +20
Here the missing term is -18d
The coefficient is -18
Therefore, answer is -18.
