SOLUTION: Re function f(x)=3x(squared)-x-2 If f(x)=-2, what is x?

Question 146768: Re function f(x)=3x(squared)-x-2
If f(x)=-2, what is x?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given function

Plug in

Add 2 to both sides

Factor the right side.

or Set each factor equal to zero. Remember, if then either or .

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So our 1st answer is .

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Now let's solve the 2nd equation

Start with the given equation.

Add to both sides.

Combine like terms on the right side.

Divide both sides by to isolate .

So our 2nd answer is .

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Answer:

So the solutions are:

or

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