Question

"> + 2xy + $y^{2}$ when x = -2 and y = -3

Answer 1

Answer:

25

Step-by-step explanation:

x² + 2xy + y²

i) substitute x = -2 into the expression

(-2)² + 2(-2)y + y²

= 4 - 4y + y²

ii) substitute y = -3 into the expression

4 - 4y + y²

= 4 - 4(-3) + (-3)²

= 4 + 12 + 9

iii) add the numbers

4 + 12 + 9

= 16 + 9

= 25