Use the Quadratic Formula to Solve with Surds.
Question 1:
x
2
−
15
x
+
5
=
0
x
=
15
±
205
2
Question 2:
x
2
+
10
x
+
8
=
0
x
=
-5
±
17
Question 3:
x
2
−
12
x
+
6
=
0
x
=
6
±
30
Question 4:
x
2
−
10
x
−
3
=
0
x
=
5
±
2
7
Question 5:
x
2
−
7
x
−
6
=
0
x
=
7
±
73
2
Question 6:
x
2
+
6
x
+
1
=
0
x
=
-3
±
2
2