Use the Quadratic Formula to Solve to 3 s.f.
Question 1:
x
2
−
4
x
−
8
=
0
x
=
5.46
or
-1.46
Question 2:
x
2
+
11
x
−
7
=
0
x
=
0.603
or
-11.6
Question 3:
x
2
+
3
x
−
2
=
0
x
=
0.562
or
-3.56
Question 4:
2
x
2
+
6
x
+
3
=
0
x
=
-0.634
or
-2.37
Question 5:
3
x
2
−
6
x
+
3
=
0
x
=
1
or
1
Question 6:
4
x
2
+
14
x
+
7
=
0
x
=
-0.604
or
-2.9
