Multiply using the FOIL method.
-(0.3 - 7a)(0.6 + 4a)
A) $0.18 - 3 a - 28 a ^ { 2 }$
B)0. $0.18 + 3 a - 28 a ^ { 2 }$
C) $0.18 - 3 a - 0.28 a ^ { 2 }$
D)1 $18 - 3 a - 28 a ^ { 2 }$

Question

Quizplus · Accepted Answer

Using the FOIL method (First, Outer, Inner, Last) to multiply (0.3 - 7a)(0.6 + 4a), we get: First: $0.3 \times 0.6 = 0.18$, Outer: $0.3 \times 4a = 1.2a$, Inner: $-7a \times 0.6 = -4.2a$, Last: $-7a \times 4a = -28a^2$. Adding these together: $0.18 + 1.2a - 4.2a - 28a^2 = 0.18 - 3a - 28a^2$.

Multiply Using the FOIL Method 0.18−3a−28a20.18 - 3 a - 28 a ^ { 2 }0.18−3a−28a2

Multiply Using the FOIL Method $0.18 - 3 a - 28 a ^ { 2 }$