Question

If x + y = 8, and xy = 15, then what is the value of x^2 + y^2?​

Answer 1

Step-by-step explanation:

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

( 8)^2=x^2+y^2+2×15

64=x^2+y^2+30

64-30=x^2+y^2

x^2+ y^2=34

Answer 2

Answer:

Here is your answer, mate: x² + y² = 34

Step-by-step explanation:

x + y = 8

(x + y)² = 8²

x² + 2xy + y² = 64

Given that xy = 15, then,

x² + 2 × 15 + y² = 64

x² + 30 + y² = 64

x² + y² = 64 - 30

x² + y² = 34

hope this helps u

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