boomerang285
please help me with this square root problem...



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boomerang285
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\[\left( 5\sqrt{9} \right)^{2}\]

rvgupta
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16+i10*9^1/2

littlepixie99
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well what is 5 *5?
remember negative times negative is a positive
then what is rt9^2?

boomerang285
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25 and 3 right?

boomerang285
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and rvgupta, i come up with that answer too but its not one of my multiple choice options

littlepixie99
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25 is correct,
but if you sq rt a number and then sq it again you get the original number

littlepixie99
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so you've rooted it but not resquared it

boomerang285
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so it is 9?

boomerang285
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16

littlepixie99
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is that an option?

boomerang285
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for some reason i keep coming up with 1610i\[\sqrt{9}\]

boomerang285
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there is 16 + 30i

littlepixie99
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where did the 10i come from?

boomerang285
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i am not really sure... i know i worked it out wrong, and 10i isnt even an option....

boomerang285
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yes

littlepixie99
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think of it this way
5*5
rt9*rt9
5*rt9
5*rt9
and add all those together

estudier
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16+30i