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Mathematics
Problem
Which of the following quadratic equations represents a graph that opens upwards and does not meet the
x
x
x
-axis? a)
−
x
2
+
2
x
−
3
=
0
-x^{2}+2x-3=0
−
x
2
+
2
x
−
3
=
0
b)
x
2
+
6
x
+
9
=
0
x^{2}+6x+9=0
x
2
+
6
x
+
9
=
0
c)
x
2
+
4
x
+
5
=
0
x^{2}+4x+5=0
x
2
+
4
x
+
5
=
0
d)
2
x
2
+
3
x
−
2
=
0
2x^{2}+3x-2=0
2
x
2
+
3
x
−
2
=
0
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