SOLUTION: f(x)=3x^2-7x-11 I was able to get the solutions but now i need to find the x intercepts. I am having problems find the solutions. this is from a teacher handout

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: f(x)=3x^2-7x-11 I was able to get the solutions but now i need to find the x intercepts. I am having problems find the solutions. this is from a teacher handout      Log On


   

Question 191570: f(x)=3x^2-7x-11 I was able to get the solutions but now i need to find the x intercepts. I am having problems find the solutions. this is from a teacher handout
Found 2 solutions by jim_thompson5910, checkley75:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Let's say that the solutions are "p" and "q" (where "p" and "q" are simply numbers). The x-intercepts are then (p, 0) and (q, 0). So basically, the solutions and the x-intercepts are almost one in the same. Let me know if this makes sense.

Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=3x^2-7x-11
+graph%28+300%2C+200%2C+-6%2C+5%2C+-15%2C+10%2C+3x%5E2+-7x+-11%29+ (graph 300x200 pixels, x from -6 to 5, y from -15 to 10, 3x^2 -7x -11).
4x^2-7x-11
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(7+-sqrt[-7^2-4*3-11])/2*3
x=(7+-sqrt[49+132])/6
x=(7+-sqrt181)/6
x=(7+-13.45)/6
x=(7+13.45)/6
x=20.45/6
x=3.41 ans.
x=(7-13.45)/6
x=-6.45/6
x=-1.075 ans.
x intercepts=(-1.075 & 3.41)