The denominator in your fraction exponent became your index of your radical, and since it was a negative exponent you must move it down to the denominator to make it positive.
Exactly where is your difficulty? You don't understand negative exponents? You don't understand rational (fractional) exponents? You can't do any algebra at all??
You're getting answers with decimals.
If you're going to use your calculator, what's the problem?
A negative exponent "moves" the expression. If it is in the numerator, it moves to the denominator. If it is in the denominator, it moves to the numerator.
And we drop the "minus".
So: 16−21=16211
You're expected to know that a 21 power means "square root".
Yes. That helps me understand square roots better.
soroban said:
Hello, Richay!
Exactly where is your difficulty? You don't understand negative exponents? You don't understand rational (fractional) exponents? You can't do any algebra at all??
You're getting answers with decimals.
If you're going to use your calculator, what's the problem?
A negative exponent "moves" the expression. If it is in the numerator, it moves to the denominator. If it is in the denominator, it moves to the numerator.
And we drop the "minus".
So: 16−21=16211
You're expected to know that a 21 power means "square root".
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