Question

given (x-y) = 5 and xy =36 find thevalue of x square + y square​

Answer 1

Answer:

97

Step-by-step explanation:

x=5+y

y(5+y)=36

y^2+5y-36=0

y^2-9y+4y-36=0

y(y-9) +4(y-9) =0

y = 9, -4

so x = -4,9

therefore x^2+y^2=-4^2+9^2

=16+81=97