3 years ago

How to solve 8 = 2^x + 4?

2 answers:

7 0

You are looking for what +4 = 8 so you take the 2^x and find what would make that 4. 2 squared is 4 (2x2) which makes 8=4+4

4+4=8 8=8

bearhunter [10]3 years ago

3 0

8 = 2^x + 4
2^x = 8 - 4
2^x = 4
as you know 4 = 2^2 so now you have:
2^x = 2^2
x = 2

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