Question

Answer with work pretty plzzz

Answer 1

48

Explanation:

2x² + 3xy - 4y²

2 * 2² + 3 * 2 * (-4) - 4 x -4²

=48

Answer 2

-80

Explanation:

When x=2 and y= -4

2x² + 3xy - 4y² = 2(2)² + 3(2)(-4) - 4(-4)² = 8 - 24 -4(16) = -16 - 64 = -80