x=-.7+1.8734994i and x=-.7-1.8734994i
Explanation:
2x+5x² +7x+10+6+4+-2x=(5x²)+(2x+7x-2x)+(10+6+4)=5x²+7x+20
quadratic equation
x=(-b±√(b²-4ac))/2a
where a=5, b=7, c=20
x=(-7±√(7²-4(5)(20)))/(2(5))
x=(-7±√((49-400))/10
x=(-7±√(-351))/10
x=(-7±18.734994i)/10
x=-.7+1.8734994i and x=-.7-1.8734994i