Question

What is the simplified form of (- 7+ 8i) - (- 5i + 4i?)?

Answer 1

Answer: 7-

Step-by-step explanation:

Answer 2

Answer:

9 i - 7

Step-by-step explanation:

Simplify the following:

-7 + 8 i - (-5 i + 4 i)

Hint: | Combine like terms in -5 i + 4 i.

-5 i + 4 i = -i:

-7 + 8 i - -i

Hint: | Multiply all instances of -1 in -(-i).

(-1)^2 = 1:

-7 + 8 i + i

Hint: | Add the numbers in -7 + 8 i + i together.

Add like terms. -7 + 8 i + i = -7 + 9 i:

Answer: 9 i - 7