Для квадратного уравнения \(\displaystyle x^2+4x-7=0\) вычислите дискриминант

\(\displaystyle {\rm D}=\)[ ],

найдите корни уравнения и упростите их.

\(\displaystyle x_1=\)

\(\displaystyle -\)[ ]\(\displaystyle +\)[ ]   [ ]

\(\displaystyle =\)

[ ]

 

\(\displaystyle x_2=\)

\(\displaystyle -\)[ ]\(\displaystyle -\)[ ]   [ ]

\(\displaystyle =\)

[ ]