1 Use Negative Power Rule:
x
−
a
=
1
x
a
x
−a
=
x
a
1
1
2
5
×
2
8
2
5
1
×2
8
2 Simplify
2
5
2
5
to
3
2
32
1
3
2
×
2
8
32
1
×2
8
3 Simplify
2
8
2
8
to
2
5
6
256
1
3
2
×
2
5
6
32
1
×256
4 Simplify
2
5
6
3
2
32
256
5 Simplify
8
Answer: 8
Now. The answer is A. Because:
x
−
a
=
1
x
a
x
−a
=
x
a
1
2
2
1
2
2
1
2
2
2 Simplify
2
2
2
2
to
4
4
4
1
2
2
1
4
3 Invert and multiply
4
×
2
4×2
4 Simplify
8
Answer: 8
So answer to your question is:
A
