Question

Jika x+1/x = 3 ,maka x²+1/x² = ...........

Answer 1

X+1/x=3
x+1=3x
1=3x-x
1=2x
x=1/2=0,5
maka,
x²+1/x²= (0,5)²+1/(0,5)²
           = 0,25+1/0,25= 5