Use the Quadratic Formula to Solve to 3 s.f.
Question 1:
x
2
−
14
x
−
8
=
0
x
=
14.5
or
-0.55
Question 2:
x
2
+
4
x
+
2
=
0
x
=
-0.586
or
-3.41
Question 3:
x
2
+
15
x
+
3
=
0
x
=
-0.203
or
-14.8
Question 4:
2
x
2
−
13
x
+
9
=
0
x
=
5.71
or
0.788
Question 5:
3
x
2
−
11
x
+
10
=
0
x
=
2
or
1.67
Question 6:
5
x
2
+
13
x
−
9
=
0
x
=
0.568
or
-3.17
