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# If 4x =√5 + 2 then find the value of 4x-1/16x?

1) Substitute 4x for √5 + 2 Now you have √5 + 2 - 1 / 16x which can be cancelled to √5 + 1 / 16x 2) 16x is 4 times 4x so times √5 + 2 by 4 which is 16.94 Now you have √5 + 1 / 16.94 which can be put into a calculator and comes out to equal 2.295 (to 3.d.p)

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