Use the Quadratic Formula to Solve to 3 s.f.
Question 1:
x
2
−
10
x
+
3
=
0
x
=
9.69
or
0.31
Question 2:
x
2
−
4
x
−
9
=
0
x
=
5.61
or
-1.61
Question 3:
x
2
+
5
x
−
3
=
0
x
=
0.541
or
-5.54
Question 4:
3
x
2
+
2
x
−
10
=
0
x
=
1.52
or
-2.19
Question 5:
2
x
2
−
11
x
+
3
=
0
x
=
5.21
or
0.288
Question 6:
2
x
2
+
9
x
+
6
=
0
x
=
-0.814
or
-3.69
