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**sologuitar****Member**- Registered: 2022-09-19
- Posts: 467

Write the expression in the standard form a + bi.

6i^3 + 4i^5

6(-i) + 4(i)

-6i + 4i

My answer = -2i

Textbook answer = -10i

Why is my answer wrong?

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**Bob****Administrator**- Registered: 2010-06-20
- Posts: 10,514

I like your answer.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Sometimes I deliberately make mistakes, just to test you! …………….Bob

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**amnkb****Member**- Registered: 2023-09-19
- Posts: 253

sologuitar wrote:

Write the expression in the standard form a + bi.

6i^3 + 4i^5

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**sologuitar****Member**- Registered: 2022-09-19
- Posts: 467

Bob wrote:

I like your answer.

Bob

Thanks. It must be a textbook typo. Math and physics books are famous for having lots of computational errors.

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**sologuitar****Member**- Registered: 2022-09-19
- Posts: 467

amnkb wrote:

sologuitar wrote:Write the expression in the standard form a + bi.

6i^3 + 4i^5

Sure feels good to be right. Like I told Bob, math and physics books are famous for having computational errors.

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