Solve. Simplify all radicals.
4) (5 − 8)2 = −6
5) (7 − 1)2 = 32
6) −2 2 + = −1
7)
1
5
2 + = −1
8)
1
2 2 − = −
15
2
9) 2 −
5
12 =
1
6
10) 2 −
100
81
= o