Question 289794
The original quadratic equation is {{{ 3.4*x^2-8.7*x-17.1=0 }}}
Multiply 10 on both sides, you should get {{{ 34*x^2-87*x-171=0 }}}
Either you factor or use the quadratic formula is up to you. I always trust the quadratic equation even though it is longer.
Quadratic formula: {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
a= 34
b= -87
c= -171
Plug in the values for the variables in the quadratic formula!
{{{x = (-(-87) +- sqrt( (-87)^2-4*34*-171 ))/(2*34) }}}
Simplify the equation:
{{{x = (87 +- sqrt( 7569+23256 ))/(68) }}}
{{{x = (87 +- sqrt( 30825 ))/(68) }}}