Question

Plzzz solve it step by step....

Answer 1

Hi There.......
Here is the solution

x- 1/x
= (x²-1)/x
now putting the value of x
=[ (7-4√3)² -1] / (7-4√3)
=[49+48-56√3 -1] / (7-4√3)
=(96-56√3) / (7-4√3)

we multiplying numerator and denominator by (7+ 4√3)

=[(96-56√3)(7+4√3)] / [(7-4√3)(7+4√3)]
= [672-392√3 +384√3 -672] / [49 -48]
= (-8√3) / (1)
= -8√3
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Hope it helps...