Sabendo que x2 + y2=74 e que xy=35, calcule valor de (x - y2) 2

To solve this problem you must apply the proccedure shown below:

1. You have the following information given in the problem above:

- x²+y² = 74

xy=35

2. Therefore, you have that (x-y) ² is:

= (x-y) ²

=x²-2xy+y²

= (x²+y²) - 2xy

3. When you substitute the values given in the problem, you obtain:

=74-2 (35)

=74-70

=4

4. Therefore, as you can see, the correct answer is: 4