Question

If x2 +y2 = 100 and xy =22 ,the value of x + y will be *
A 10
B 11
C 12
D 12
​

Answer 1

Answer:

x+y=12

Step-by-step explanation:

(x+y)^2=x2+y2+2xy

           = 100+2 x 22

            100+44

(x+y)^2 = 144

x+y=root 144

x+y=12

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