Find all real solutions of equation 2x2+4x+7=0\displaystyle {2}{x}^{{2}}+{4}{x}+{7}={0}.

Does the equation have real solutions?

If your answer is Yes, input the solutions:
x1=\displaystyle {x}_{{1}}= and x2=\displaystyle {x}_{{2}}= with x1x2\displaystyle {x}_{{1}}\le{x}_{{2}}.