Question 1009940


{{{x^2-7x-6=0}}}


 {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}

 {{{x = (-(-7) +- sqrt( (-7)^2-4*1*(-6) ))/(2*1) }}}

{{{x = (7 +- sqrt(49+24 ))/2 }}}

{{{x = (7 +- sqrt(73 ))/2 }}}

{{{x = (7 +- 8.544003745317531)/2 }}}

{{{x = (7 +- 8.5)/2 }}}

solutions:

{{{x = (7 + 8.5)/2 }}}

{{{x = 15.5/2 }}}

{{{x = 7.75 }}}

or

{{{x = (7 - 8.5)/2 }}}

{{{x = -1.5/2 }}}

{{{x = -0.75 }}}

{{{ graph( 600, 600, -10, 10, -10, 10, x^2-7x-6) }}}