Question 844070
{{{x+(x-3)=4(x^2-9)}}}
{{{2x-3=4x^2-36}}}
{{{4x^2-2x-33=0}}}
You have a sign error in your constant term and your x term,
Use the quadratic formula,
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-(-2) +- sqrt( (-2)^2-4*4*(-33) ))/(2*4) }}}
{{{x = (2 +- sqrt( 4+528 ))/(2*4) }}}
{{{x = (2 +- sqrt( 532 ))/(8) }}}
{{{x = (2 +- 2*sqrt( 133 ))/(8) }}}
{{{highlight(x = (1 +- sqrt( 133 ))/(4)) }}}