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#1 2015-03-09 06:43:52

CIV
Member
Registered: 2014-11-09
Posts: 74

Solving a quadratic equation by extracting square roots.

Can you please just verify if I am right?

The problem:

Solving:

Proof:

I'm not going to work out the negative proof because it works out the same way. I just want to know if I worked the imaginary number out right. My professor for Algebra 2 cover this some but not really in depth. My current pre-calc teacher didn't cover it at all because he said we all should know it already. Thanks.

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#2 2015-03-09 07:16:35

zetafunc
Moderator
Registered: 2014-05-21
Posts: 2,436
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Re: Solving a quadratic equation by extracting square roots.

Yes, that's correct. In fact, you already completed the 'proof' under your 'solving' heading -- just do everything backwards.

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#3 2015-03-09 09:38:45

CIV
Member
Registered: 2014-11-09
Posts: 74

Re: Solving a quadratic equation by extracting square roots.

Ok. Thanks:)

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