SOLUTION: Hello - I am having trouble solving the two equations below where i have to find the domain. I am using the quadratic formula to solve them. Because i thought it would be the e

Algebra ->  Functions -> SOLUTION: Hello - I am having trouble solving the two equations below where i have to find the domain. I am using the quadratic formula to solve them. Because i thought it would be the e      Log On


   

Question 678975: Hello -
I am having trouble solving the two equations below where i have to find the domain. I am using the quadratic formula to solve them. Because i thought it would be the easiest way to solve it.. But i am running into errors obtaining the final answer. Can someone explain.
1) f(x) = (x^4-8x^3+9)/3x^2-5x-28
2) f(x) = x^2+3x-13
Thanks
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
1) where the denominator cannot be zero
3x%5E2-5x-28+=+0
(3x+7)(x-4) = 0
Domain is all real numbers except 4 and -7%2F3
...
graph%28300%2C200%2C-20%2C20%2C-30%2C30%2C%28x%5E4-8x%5E3%2B9%29%2F%283x%5E2-5x-28%29%29
...
2) domain is all real numbers
graph%28300%2C200%2C-10%2C10%2C-20%2C10%2Cx%5E2%2B3x-13%29
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