Question

If x+y = 10 and xy = 21, find 2(x^2 + y^2)​

Answer 1

Answer:

2( x^2+y^2)

(x+y)^2 = 100

x^2+y^2+2xy = 100

x^2+y^2+2 (21) = 100

x^2+y^2 = 58

2 (x^2+y^2) = 116

Hope it's helpful for you................

Answer 2

Answer:

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