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Math Drills
Quadratic equations
Quadratic formula
Practice 1
Quadratic equations
Quadratic formula
1 / 5
Basic
Solve the equation.
x
2
+
3
x
+
1
=
0
x^{2} + 3x + 1 = 0
x
2
+
3
x
+
1
=
0
1
x
=
3
+
5
2
,
x
=
3
−
5
2
x = \frac{3 + \sqrt{5}}{2},\ x = \frac{3 - \sqrt{5}}{2}
x
=
2
3
+
5
,
x
=
2
3
−
5
2
x
=
−
3
+
13
2
,
x
=
−
3
−
13
2
x = \frac{-3 + \sqrt{13}}{2},\ x = \frac{-3 - \sqrt{13}}{2}
x
=
2
−
3
+
13
,
x
=
2
−
3
−
13
3
x
=
−
3
+
5
2
,
x
=
−
3
−
5
2
x = \frac{-3 + \sqrt{5}}{2},\ x = \frac{-3 - \sqrt{5}}{2}
x
=
2
−
3
+
5
,
x
=
2
−
3
−
5
4
x
=
3
+
13
2
,
x
=
3
−
13
2
x = \frac{3 + \sqrt{13}}{2},\ x = \frac{3 - \sqrt{13}}{2}
x
=
2
3
+
13
,
x
=
2
3
−
13
Answer
