Question 793969
{{{ 4X=(X^2)-12 }}}
{{{ X^2 - 4x - 12 = 0 }}}
now by using quadratic formula or through factorization method or perfect square method solve for X.
here am using quadratic formula
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-(-4) +- sqrt( (-4)^2-4*(1)*(-12) ))/(2*1) }}}
{{{x = (-(-4) +- sqrt( 64 ))/(2) }}}
{{{x1 = (-(-4) - sqrt( 64 ))/(2) = (4-8)/2 = -2 }}} 
{{{x2= (-(-4) + sqrt( 64 ))/(2) = (4+8)/2 =6 }}}