Question 1153959


{{{7x^2 = -12x - 2}}}

{{{7x^2+12x +2=0}}}


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

{{{x = (-12 +- sqrt( 12^2-4*7*2 ))/(2*7) }}} 

{{{x = (-12 +- sqrt( 144-56 ))/14 }}} 

{{{x = (-12 +- sqrt( 88))/14 }}} 

{{{x = (-12 +- 2sqrt(22))/14 }}} 

{{{x = (-6 +- sqrt(22))/7 }}} 

solutions:

{{{x = (-6 + sqrt(22))/7 }}} =>{{{x = -6/7 + sqrt(22)/7 }}} => approximately {{{-0.2}}}

{{{x = (-6 - sqrt(22))/7 }}} =>{{{x = -6/7 -sqrt(22)/7 }}} => approximately {{{-1.5}}}


{{{ graph( 600, 600, -10, 10, -10, 10, 7x^2+12x +2) }}}