Question

(3x)2 – 7y2, when x = 3 and y = 2

Answer 1

$3 \times 3 \times 2 - 7 \times 2 \times 2 \\ 18 - 28 \\ - 10$

Answer 2

Answer:

115

Step-by-step explanation:

(3x)^2 – 7y^2

Plug in:

(3×3)^2 – 7×2^2

9^2 - 14^2

81 - 196

115

Hope this helped.