Use the Quadratic Formula to Solve to 3 s.f.
Question 1:
x
2
+
11
x
+
2
=
0
x
=
-0.185
or
-10.8
Question 2:
x
2
+
x
−
6
=
0
x
=
2
or
-3
Question 3:
x
2
−
7
x
−
8
=
0
x
=
8
or
-1
Question 4:
5
x
2
−
x
−
4
=
0
x
=
1
or
-0.8
Question 5:
4
x
2
+
11
x
−
6
=
0
x
=
0.466
or
-3.22
Question 6:
5
x
2
−
6
x
−
2
=
0
x
=
1.47
or
-0.272
