SOLUTION: Solve the quadratic equation 3x^2 + 2x + 2 using the quadratic formula. Explain what this means in terms of the function f(x) = 3x^2 + 2x + 2 crossing the x-axis. Verify the answer

Algebra ->  Rational-functions -> SOLUTION: Solve the quadratic equation 3x^2 + 2x + 2 using the quadratic formula. Explain what this means in terms of the function f(x) = 3x^2 + 2x + 2 crossing the x-axis. Verify the answer      Log On


   

Question 856527: Solve the quadratic equation 3x^2 + 2x + 2 using the quadratic formula. Explain what this means in terms of the function f(x) = 3x^2 + 2x + 2 crossing the x-axis. Verify the answer using an alternative method.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

f(x) = 3x^2 + 2x + 2   |reference f(x) = ax^2 + bx + c

x+=+%28-b+%2B-+green%28sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%29%2F%282%2Aa%29+

x+=+%28-2+%2B-+sqrt%28+4-24+%29%29%2F%286%29+ 

x+=+%28-2+%2B-+sqrt%28+-20+%29%29%2F%286%29+ 

sqrt%28+green%28b%5E2-4%2Aa%2Ac+%29%29%3C=+0  NO real roots, does not cross the x-axis