Question

If x-y=9and xy=16,find the value of x²+y² plzzzzz do with process plzzzzzzz
$plzzzzz$
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Answer 1

Answer:

x - y = 9

Squaring both sides,

( x - y) ^2 = 81

x^2 + y^2 - 2xy = 81

x^2 + y^2 = 81 + 2xy

x^2 + y^2 = 81 + 2( 16 )

x^2 + y^2 = 81 + 32 = 113

x^2 + y^2 = 113

Answer 2

Answer:

put identity (x^2+x^2)

=(x+y)^2=x^2+2×x×y+y^2