SOLUTION: Find the zero of the function algebriacally 3X2-22x-6

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Question 157638: Find the zero of the function algebriacally
3X2-22x-6
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
3x%5E2-22x-6=0
Use the quadratic formula,
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x+=+%28-%28-22%29+%2B-+sqrt%28+%28-22%29%5E2-4%2A3%2A%28-6%29+%29%29%2F%282%2A3%29+
x+=+%2822+%2B-+sqrt%28+484%2B72+%29%29%2F%286%29+
x+=+%2822+%2B-+sqrt%28+556%29%29%2F%286%29+
x+=+%2822+%2B-+sqrt%28+4%2A139%29%29%2F%286%29+
x+=+%2822+%2B-+2sqrt%28+139%29%29%2F%286%29+
x+=+%2811+%2B-+sqrt%28+139%29%29%2F%283%29+
or approximately,
x=7.60 and x=-0.26
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Let's graph to function to verify the solution.
+graph%28+300%2C+300%2C+-2%2C+8%2C+-50%2C+50%2C+3x%5E2-22x-6%29+
Looks good.