Question

If x + y = 30 and xy = 5, find x 2 + y 2 .

Answer 1

Answer:

890

Step-by-step explanation:

x+y=30

square on both sides

(x+y)^2=x^2+y^2+2xy

30^2=x^2+y^2+2(5)

x^2+y^2=30^2-19=890

hope you understand this