Question

Evaluate
1/3^-2x^-4y^2 for x = 3 and y = -1.

Answer 1

1/9

Explanation:

First turn all the negative exponents into positive by flipping the fractions then plug in the given values.

(3/1)^2 * (1/x)^4 * y^2

Simplify to:

9 * 1/(x^4) * y^2

Plug in:

9 * 1/(3^4) * -1^2

Simplify:

9 * 1 * 1/(3^4) = 9/(3^4) = 9/81 = 1/9