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When you have to of the same variable (p^20 and p^-8) can you add the exponents? (p^12)?

 Nov 20, 2014

Best Answer 

 #2
avatar+4473 
+10

Only if it is in fraction form...p^20 / p^-8 = p^12...you can subtract exponents to get 12.

But, p^20 + p^-8 does not equal p^12...Suppose p = 2...try it out with the calculator.

 

As a general rule, make sure the exponents are the same: x^3 + x^3 = 2x^3, but you cannot apply this to x^3 + x^5.

 Nov 20, 2014
 #1
avatar+57 
0

i believe you can?

 Nov 20, 2014
 #2
avatar+4473 
+10
Best Answer

Only if it is in fraction form...p^20 / p^-8 = p^12...you can subtract exponents to get 12.

But, p^20 + p^-8 does not equal p^12...Suppose p = 2...try it out with the calculator.

 

As a general rule, make sure the exponents are the same: x^3 + x^3 = 2x^3, but you cannot apply this to x^3 + x^5.

AzizHusain Nov 20, 2014

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