Question

Substitute the values of x and y into the expression -3x 2 + 2y 2 + 5xy - 2y + 5x 2 - 3y 2. Match that value to one of the numbers.

1. x = 2, y = -1

9.17

2. x = 0, y = 2.5

1.665

3. x = -1, y = -3

-11.25

4. x = 0.5, y =

14

5. x = , y =

-1

6. x = √2, y = √2

0.44

Answer 1

x = 2, y = -1 Answer = -1
x = 0, y = 2.5 Answer = -11.25
x = -1, y = -3 Answer = 14
x = 0.5, y = -0.1 (one tenths) Answer = 0.44
x = 0.75 (three quarters), y = 0.4 (two fifths) Answer = 1.665
x = 1.41 (sqareroot of 2), y = 1.41 (sqareroot of 2) Answer = 9.17

I hope this helps!