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Were asked to subtract all of the craziness over here. and it looks daunting but if we really focus,

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it should actually be really easy to subtract and simplify this thing. Right from the get go i have four

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time the fourth root of 81 x to the fifth and from that, i want to subtract two times the fourth root

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of eighty one x to the fifth and so you can really just say that i have four of something, and this

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something, i will just circle it yellow. i have four of these--it could be lemon-- i have four of these

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things, and i want to subtract two of these things. These are the exact same things. there the fourth

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root of eight one x to the fifth, and the fourth root of eight one x to the fifth. So, if i have four

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lemons and i want to subract two of them, im gonna have two lemons left over. If i have four of this

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thing and i have to take away two of this thing, im gonna have two of these thing left over. So these

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terms right over here simplify to two times the fourth root of eight one x to the fifth, and i got this

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two just by subtracting the quantity of four of some by two of something, and this is equal to two of

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something. And of course, we still have this minus the regular principle square root of x to the third.

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now i wanna try to simplify, i wanna try to simplify whats inside of these- under the radical signs-

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so that we can on, on this example take the fourth root and over here, actually take maybe a principle

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square root. So first of all lets see if eighty one is either a, is something to the fourth power, ot