Easy exponent precalc problem. 4^(1+√2) * 4^(1-√2)

In summary, the conversation is discussing how to solve the problem: 4^(1+√2) * 4^(1-√2). One person notes that the book says the answer is 16, while they got 16^-1. They then discuss the steps, such as foiling the exponents, and question if it should be 1-2 instead. The expert asks what should be done to the exponents instead of multiplying them, and the person eventually understands and thanks them.
  • #1
Jurrasic
98
0
Can anyone do the steps to: 4^(1+√2) * 4^(1-√2)?
The book says it's 16, but I got 16^-1
steps:
foil exponents: that comes out to 1-2 ? Should it not be ?
then, just multiply the 4's, or do you add them?
 
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  • #2
Jurrasic said:
foil exponents

This is your problem. What should you be doing to the exponents?
 
  • #3
gb7nash said:
This is your problem. What should you be doing to the exponents?

can you rephrase that, what do you mean by that?
 
  • #4
Jurrasic said:
can you rephrase that, what do you mean by that?

You're trying to foil the exponents. That indicates that you're multiplying them. What should you be doing instead to the exponents?
 
  • #5
gb7nash said:
You're trying to foil the exponents. That indicates that you're multiplying them. What should you be doing instead to the exponents?

Got it thanks
 

FAQ: Easy exponent precalc problem. 4^(1+√2) * 4^(1-√2)

What is the simplified form of 4^(1+√2) * 4^(1-√2)?

The simplified form of 4^(1+√2) * 4^(1-√2) is 4^2, which simplifies to 16.

How do you combine the exponents in 4^(1+√2) * 4^(1-√2)?

To combine the exponents, we use the rule that says a^x * a^y = a^(x+y). Therefore, 4^(1+√2) * 4^(1-√2) becomes 4^(1+√2+1-√2), which simplifies to 4^2.

Can the exponents be combined if they have different bases?

No, the exponents can only be combined if they have the same base. In this case, both exponents have the base of 4, so they can be combined.

Why do we need to use the exponent rule to solve this problem?

We use the exponent rule to simplify the problem and make it easier to solve. Without using the rule, we would have to multiply 4^(1+√2) * 4^(1-√2) manually, which can be time-consuming and prone to errors.

Can 4^(1+√2) * 4^(1-√2) be simplified further?

No, the simplified form of 4^(1+√2) * 4^(1-√2) is 4^2, which cannot be simplified further. This is because the exponents are already combined and there are no other rules or operations that can be applied to simplify it further.

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