Use the Quadratic Formula to Solve with Surds.
Question 1:
x
2
−
15
x
−
3
=
0
x
=
15
±
237
2
Question 2:
x
2
−
12
x
−
7
=
0
x
=
6
±
43
Question 3:
x
2
−
10
x
−
6
=
0
x
=
5
±
31
Question 4:
x
2
+
5
x
−
3
=
0
x
=
-5
±
37
2
Question 5:
x
2
−
6
x
−
3
=
0
x
=
3
±
2
3
Question 6:
x
2
−
15
x
−
5
=
0
x
=
15
±
7
5
2