Question

If x+y=8 and xy=15, find x + y?.​

Answer 1

Answer:

8

Step-by-step explanation:

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Answer 2

Answer:

(X+y)=8 and xy=15

by squaring both side

X^2+y^2=8^2

x^2+y^2+2xy=64

x^2+y^2+2*15=64

x^2+y^2=64-30

X^2+y^2=34

(X+y)^2=34

X+y=√34

X+Y=2*2*2*2*2

X+y=4√2

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