Question

Evaluate 3x2 - 2xy + 4y2 for x = -1 and y = -2. .​

Answer 1

The answer is 12

Explanation:

3x² - 2xy + 4y²

Let x = -2

y = -1

3(-2)² - 2(-2)(-1) + 4(-1)²

= 3(4) - 2(2) + 4(1)

= 12 - 4 + 4

= 12