Question

Find the value of x²+y² if x+y=6 and xy=8.
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Answer 1

Answer:

20

Step-by-step explanation:

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

6^2=x^2+y^2+2×8

x^2+y^2=36-16

20

Answer 2

Answer:

Step-by-step explanation:

(x+y)²=x²+y²+2xy

6² =x²+y²+16

x²+y²=16-6=10