SOLUTION: Please help me solve this equation: It asks to find the x-intercept of the function given by: {{{f(x)=3x^2+x-5}}}

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Please help me solve this equation: It asks to find the x-intercept of the function given by: {{{f(x)=3x^2+x-5}}}      Log On


   

Question 311576: Please help me solve this equation: It asks to find the x-intercept of the function given by:
f%28x%29=3x%5E2%2Bx-5
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=3x^2+x-5
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(-1+-sqrt[1^1-4*3*-5])/2*3
x=(-1+-sqrt[1+60])/6
x=(-1+-sqrt61)/6
x=(-1+-7.81)/6
x=(-1+7.81)/6
x=6.81/6
x=1.13 ans.
x=(-1-7.81)/6
x=-8.81/6
x=-1.47 ans.
x intercepts (1.13 & -1.47)
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+3x%5E2+%2Bx+-5++%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 3x^2 +x -5).