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23 May, 12:11

Why expression 7*3 to the x is not equal to the expression 21 to the x?

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  1. 23 May, 12:22
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    Do you mean: 7*3^x or (7*3) ^x? For the first one, 7*3^x is not equal to 21^x because 7 * (3^x) is not the same as 21^x. Now, this may sound confusing, so let's give x a value. If x = 2, then the expression would be 7 * (3^2), which is 7*9, and that's not the same as 21^2 (42).
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