SOLUTION: 9) Solve. Round results to the nearest thousandth. 7x2 - 6x

SOLUTION: 9) Solve. Round results to the nearest thousandth. 7x2 - 6x - .4255 = 0

Question 156881: 9) Solve. Round results to the nearest thousandth.
7x2 - 6x - .4255 = 0

Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
7x2 - 6x - .4255 = 0
Using the quadratic equation: WE get;
x=(6+-sqrt[-6^2-4*7*-.4255])/2*7
x=(6+-sqrt[36+11.914])/14
x=(6+-sqrt47.914)/14
x=(6+-6.922)/14
x=12.922/14
x=.923 answer.
x=(6-6.922)/14
x=-.922/14
x=-.066 answer.
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