What is the excluded value of x for x^2+3x+2
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x^2+2x+1

Question

What is the excluded value of x for x^2+3x+2
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                                                      x^2+2x+1

anonymous · Answer

Excluded values make the denominator 0.
You want to set the denominator equal to 0 and then solve that equation by factoring

anonymous · Answer

So would I subtract 2x from the top then?

anonymous · Answer

No, you don't have to do anything to the top. The equation to solve is
x² + 2x + 1 = 0

anonymous · Answer

I have a feeling that I'm doing this wrong then. I got x^2+2x+1=0; 2x+2x+1=0; 4x+1=0; and then I subtract one from both sides; and I get 4x=-1; x=-4

anonymous · Answer

Why did you turn x² into 2x?

anonymous · Answer

Don't you multiply the square root by the number it is rooting from?

anonymous · Answer

no. and we can't take a square root of just one term. You'd have to do it for the whole equation.

anonymous · Answer

Do you want to try the quadratic equation to solve it?

anonymous · Answer

I just tried the equation and got -4 for the answer?

anonymous · Answer

have you ever done FOIL or reverse FOIL? Does this look familiar?
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