Solve equation by factoring.
1) 5v^2=-30-40

Please someone teach me how to do this so I will learn how to do this for the test and thank you!! ^.^

Question

Solve equation by factoring.
1) 5v^2=-30-40

Please someone teach me how to do this so I will learn how to do this for the test and thank you!! ^.^

anonymous · Answer

well for factoring 
first make sure everything is in the form

Ax^2 +By +C =0

anonymous · Answer

Cant you reduce 70/5?

anonymous · Answer

Yeah ok iforgot what about that factoring

anonymous · Answer

?

anonymous · Answer

Please help I havce a test tomorow

anonymous · Answer

That Ax^2+B+C=0 thing I forgot how to use it

anonymous · Answer

is this solving 
by
 factoring
or 
completing the square?

anonymous · Answer

what do you want

anonymous · Answer

It says solve each equation by factoring.

anonymous · Answer

Did u jus delete that

anonymous · Answer

$$5v^2=-30-40$$
$$5v^2=-70$$
$$v^2=-14$$
$$v = -i \sqrt(14)$$
$$v = i \sqrt(14)$$

anonymous · Answer

ya those were bad numbers

anonymous · Answer

What is the i for? again?

anonymous · Answer

Did you simplify it some_someone? to get 14? By dividing 5 on both sides?

anonymous · Answer

yes

anonymous · Answer

But what is the i for though?

anonymous · Answer

divide by 5. 

the "i" represents imaginary numbers. or complex numbers.

anonymous · Answer

Can you explain how that works plz?

anonymous · Answer

$$i = \sqrt{-1}$$
 
so...

$$\sqrt{-x} = i \sqrt{x}$$

anonymous · Answer

anonymous · Answer

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