Use the Quadratic Formula to Solve to 3 s.f.
Question 1:
x
2
−
5
x
−
1
=
0
x
=
5.19
or
-0.193
Question 2:
x
2
−
13
x
−
7
=
0
x
=
13.5
or
-0.518
Question 3:
x
2
−
12
x
−
3
=
0
x
=
12.2
or
-0.245
Question 4:
3
x
2
+
13
x
+
7
=
0
x
=
-0.63
or
-3.7
Question 5:
2
x
2
−
13
x
+
3
=
0
x
=
6.26
or
0.24
Question 6:
2
x
2
−
12
x
−
6
=
0
x
=
6.46
or
-0.464
