Which expression is equivalent to logb(x)+logb(y)−2logb(z)\log_b(x) + \log_b(y) - 2\log_b(z)logb(x)+logb(y)−2logb(z)?
logb(xyz2)\log_b(\frac{xy}{z^2})logb(z2xy)
logb(x+y2z)\log_b(\frac{x+y}{2z})logb(2zx+y)
logb(xy−z2)\log_b(xy - z^2)logb(xy−z2)
logb(xy)logb(z2)\frac{\log_b(xy)}{\log_b(z^2)}logb(z2)logb(xy)