Question

Evaluate the exponent expression 3x-4. xy2 for x = -1 and y= 2. A

Answer 1

Given that 3x^-4.xy^2 where

x = -1 and y = 2

Substituting into the expression

3 * (-1)^-4 * (-1) * 2^2

Recall that x^-2 = 1/x^2

Hence

3 * -1 * 4

= -12

Option B is right