Question

If x + y = -2 and xy = 3
Find x^2 + y^2​

Answer 1

Answer:

x+y =-2

squaring both sides

(x+y)^2=4

using first identity

x^2 +y^2+2xy=4

x^2+y^2=4-6

=-2

Answer 2

Answer:

Step-by-step explanation:

we know that,  x + y = -2 and xy = 3

x+y = -2

(x+y)² = (-2)²

x²+y²+2xy = 4

x²+y²+2×3 = 4

x²+y²+6=4

x²+y²= -2