Is the expression 19x19^4 equivalent to (19x19)^4 explain

No, the expressions are not equivalent to each other.

Step-by-step explanation:

The first statement 19x:

This equation expanded is:

19 x 19 x 19 x 19 x 19

This is because the 19 has an exponent of 4 meaning that the 19 is being multiplied by itself four times.

This is different from the second equation because the calculation 19x19 is being multiplied four times, the expanded equation being:

(19x19) x (19x19) x (19x19) x (19x19)

Simplified to:

361 x 361 x 361 x 361 which will produce a drastically higher value than the first statement.

The first statement calculates to 2476099 whereas the second calculates to 16983563041.

Hope this helps!

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