Use the Quadratic Formula to Solve to 3 s.f.
Question 1:
x
2
−
14
x
+
4
=
0
x
=
13.7
or
0.292
Question 2:
x
2
+
13
x
+
5
=
0
x
=
-0.397
or
-12.6
Question 3:
x
2
+
7
x
+
2
=
0
x
=
-0.298
or
-6.7
Question 4:
2
x
2
−
7
x
+
1
=
0
x
=
3.35
or
0.149
Question 5:
4
x
2
+
14
x
−
5
=
0
x
=
0.327
or
-3.83
Question 6:
5
x
2
+
3
x
−
6
=
0
x
=
0.836
or
-1.44
