Question

if x-y =9 and xy=16, find the value of
$x { }^{2} + y {}^{2}$
With explanation​

Answer 1

Answer:

49 is correct answer

Step-by-step explanation:

x-y=9

xy=16

Formula

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

9^2=x^2+y^2-2*16

81=x^2+y^2-32

81-32=x^2+y^2

x^2+y^2=49

Answer 2

Answer:

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