Question

If x2+1_x2=27,find,x+1_x;x-1_x

Answer 1

Answer:

answer will be 27

because incase of first

${x}^{2} + 1 - {x}^{2} = 27 \\ 1 = 27 \\ so \: x + 1 - x = 27 \\ and \: x - 1 - x = - 27$

please mark it as a brainlist answer

Answer 2

Answer:

x² + 1/x² = 27

x² + 1/x² +2(x) (1/x) - 2(x)(1/x) = 27

x² + (1/x² +2(x-1/x) =27

(x-1/x)² = 27-2

(x-1/x)² + √25 = 0

x-1/x = + or -5