Perform the indicated operation. Write the answer in the form a + bi.
-$$7 i ( - 5 + 5 i )$$
A) $- 70 i$
B) $- 35 - 35 i$
C) $- 30 i$
D) $35 - 35 i$

Name: Perform the indicated operation. Write the answer in the form a + bi. -\[7 i ( - 5 + 5 i )\] A) $- 70 i$ B) $- 35 - 35 i$ C) $- 30 i$ D) $35 - 35 i$
Brand: Quizplus
Rating: 5.0 (36 reviews)

Question

Quizplus · Accepted Answer

Multiplying $7i$ by $(-5 + 5i)$ gives: $7i \times -5 + 7i \times 5i = -35i + 35i^2$. Since $i^2 = -1$, this simplifies to $-35i - 35$, or $-35 - 35i$.

Perform the Indicated Operation 7i(−5+5i)7 i ( - 5 + 5 i )7i(−5+5i)

Perform the Indicated Operation $7 i ( - 5 + 5 i )$