Question 1060356
Complete the square,
{{{2x^2 + 3x - 12 = 0}}}
{{{2(x^2+(3/2)x)=12}}}
{{{2(x^2+(3/2)x+(3/4)^2)=12+2(3/4)^2}}}
{{{2(x+3/4)^2=96/8+9/8}}}
{{{2(x+3/4)^2=105/8}}}
{{{(x+3/4)^2=105/16}}}
{{{x+3/4=0 +- sqrt(105)/4}}}
{{{x= -3/4 +- sqrt(105)/4}}}