How do you evaluate $4^2*4^2$ ?

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Answer 1 · 2016-11-26T14:55:44

$4^2 * 4^2 = 256$

This can be written as

$(4*4)*(4*4) => 16*16 => 256$

Answer 2 · 2016-11-26T15:10:26

$4^2 xx 4^2 = 4^4$

You can evaluate each factor and then multiply them, but you can also find the answer by using laws of indices.

Compare with

$x^2 xx x^2" "larr$ bases are the same, add the indices

= $x^(2+2) = x^4$

$4^2 xx 4^2 = 4^(2+2) = 4^4$

$4^4 = 4xx4xx4xx4 = 256$

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