beeha
beeha
16-03-2015
Math
Answered
Solve the following in quadratic equation.
7x^2+2x-1=0
Answer :
keerthika1998lekha
keerthika1998lekha
16-03-2015
please look the attachment for answer.
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Revolution
Revolution
16-03-2015
7x²+2x-1=0
a=7
b=2
c=-1
x=[tex] \frac{-b + or - \sqrt{ b^{2}-4ac } }{2a} \\ \\ \frac{-2 + or - \sqrt{ 4-4*7*-1 } }{14} \\ \\ \frac{-2 + or - \sqrt{ 32 } }{14} \\ \\ \frac{-2 + or - 5.656 }{14} \\ \\ \frac{3.656}{14} =0.26 [/tex]
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