SOLUTION: 9a2+42a-49

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Question 290245: 9a2+42a-49
Answer by checkley77(12844) About Me  (Show Source):
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9a^2+42a-49
a+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
a=(-42+-sqrt[42^2-4*9*-49])/2*9
a=(-42+-sqrt[1764+1764])/18
a=(-42+-sqrt3528)/18
a=(-42+-59.397)/18
a=(-42+59.397)/18
a=17.397/18
a=.9665 ans.
a=(-42-59.397)/18
a=-101.397/18
a=-5.633 ans.