what do you do with the exponent when the base are different?

for example : 8^-2 – 2x^0

Top 2 Answers

A few days ago

tommyburgerz

Favorite Answer

You need to know the rules first regarding exponents.

A negative exponent such as x^-2 is the same as saying 1/x^2. Another example would be 3X^-3 is the same as writing 1/3X^3.

The rule that applies for the second part is that any number with an exponent of 0 always = 1. For example 888^0 = 1.

So solving the above equation = 1/8^2 – 2 x 1

this breaks down to 1/64 -2 = 1/64 – 128/64 = -127/64

A few days ago

Beardo

8^-2 – 2x^0 = 1/8*8 – 2*1 = 1/64 – 2 = – 1 63/64

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