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3 years ago

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

Mathematics

2 answers:

ruslelena [56]3 years ago

6 0

Answer: 7-

Step-by-step explanation:

WARRIOR [948]3 years ago

4 0

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

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Step-by-step explanation:

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2 years ago

Find the reciprocal of the following: a.) 2/18 b.)7/8 c.) 30/36

matrenka [14]

Answer:

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Step-by-step explanation:

Reciprocal is when the denominator and numerator "flip."

comment if you have any more questions :)

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