Use the Quadratic Formula to Solve to 3 s.f.
Question 1:
x
2
−
4
x
−
2
=
0
x
=
4.45
or
-0.449
Question 2:
x
2
+
15
x
−
3
=
0
x
=
0.197
or
-15.2
Question 3:
x
2
+
5
x
+
6
=
0
x
=
-2
or
-3
Question 4:
4
x
2
−
8
x
−
2
=
0
x
=
2.22
or
-0.225
Question 5:
3
x
2
−
12
x
+
2
=
0
x
=
3.83
or
0.174
Question 6:
2
x
2
−
10
x
−
10
=
0
x
=
5.85
or
-0.854
