Question

if x=4-√15 find tje value of (x-1÷x) sq

Answer 1

4 is the answer here to

Answer 2

x - 4 = -√15
squaring both sides
x^2 + 16 -8x = 15
=> x^2 + 1 = 8x
dividing by x both sides
we gett x + 1/x = 8
x - 1/x = √[ (x + 1/x)^2 - 4 ] = √60