Use the Quadratic Formula to Solve to 3 s.f.
Question 1:
x
2
−
11
x
+
6
=
0
x
=
10.4
or
0.576
Question 2:
x
2
−
x
−
2
=
0
x
=
2
or
-1
Question 3:
x
2
+
2
x
−
9
=
0
x
=
2.16
or
-4.16
Question 4:
2
x
2
−
6
x
+
4
=
0
x
=
2
or
1
Question 5:
3
x
2
+
13
x
−
1
=
0
x
=
0.0756
or
-4.41
Question 6:
3
x
2
−
7
x
−
9
=
0
x
=
3.25
or
-0.922
