Question

(3x)2 – 7y2, when x = 3 and y = 2

Answer 1

`3 * 3 * 2 - 7 * 2 * 2 \\ 18 - 28 \\ - 10`

Answer 2

115

Explanation:

(3x)^2 – 7y^2

Plug in:

(3×3)^2 – 7×2^2

9^2 - 14^2

81 - 196

115

Hope this helped.