If x²-1/x+1=4,  x=?

The value of (log₉ 27+log₈ 32) is

If x²+y²+z²-64/xy-yz-zx=-2and x + y = 3z, then the value of z is:

√7921 *51+374 = (?)³

If log₁₀ 5+ log₁₀ (5x+1)= log₁₀ (x+5)+1, then x is equal to

If 3x – 3^x-1 – 18, then the value of x^x is:

(log₅ 3)X(log₃ 625) equals

The value of log_(-1/3) 81 is equal to

If pqr = 1, the value of the expression (1/(1 + p + q^-1)) + (1/(1 + q + r^-1)) + (1/(1 + r + p^-1)) is equal to

If a + b + c = 13, a² + b² + c² = 69, then find ab + bc + ca.