SOLUTION: Find the zeros of the function: f(x) = 3x^2 - 16x + 21. I am just confused on the steps, specifically with the 3x^2

Algebra ->  Functions -> SOLUTION: Find the zeros of the function: f(x) = 3x^2 - 16x + 21. I am just confused on the steps, specifically with the 3x^2      Log On


   

Question 834994: Find the zeros of the function: f(x) = 3x^2 - 16x + 21.
I am just confused on the steps, specifically with the 3x^2
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the quadratic equation,
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x+=+%28-%28-16%29+%2B-+sqrt%28+%28-16%29%5E2-4%2A3%2A21+%29%29%2F%282%2A3%29+
x+=+%2816+%2B-+sqrt%28+256-252+%29%29%2F%286%29+
x+=+%2816+%2B-+sqrt%28+4+%29%29%2F%286%29+
x+=+%2816+%2B-+2%29%2F%286%29+
x=18%2F6=3 and x=14%2F6=7%2F3
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+graph%28+300%2C+300%2C+-2%2C+6%2C+-4%2C+4%2C+3x%5E2+-+16x+%2B+21%29+