Question 624240
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Hi,
using the Quadratic Equation. 
4x^2+7=9x
  4x^2 -9x + 7 = 0   | Note:  format y = ax^2 + bx + c
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x = (9 +- sqrt( (-9)^2-4*4*7 ))/(8) }}} 
{{{x = (9 +- sqrt( -31 ))/(8) }}}
{{{x = (9 +- i*sqrt(31))/(8) }}}