annteairay22 annteairay22

18-08-2017
Mathematics

contestada

explain why the expression 7*3^x is not equal to the expression 21^x

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kphung76127 kphung76127

18-08-2017

According to the order of operations, exponents must be evaluated before multiplication.

Here's and example where x=2.
7*3^2
7*9
63

21^2=441

63 does not equal 441

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