Question

x+y=11and xy=30than find tha value of xand yX + Y is equal to 11 and X Y is equal to 30 find the value of x square + Y square

Answer 1

IF Given xy=200 & x-y=100

X-Y=100. i.e x=100+y

Put value of x in 2 equation

We get, [100+y](y)=200

100y+ y.y=200

Y.y+100y-200=0

We find roots

Y =1.96 & -101.96

Negative value be neglected

Y=1.96

Put y=1.96 in equation

X=100+y

X=100+1.96

X=101.96

Value of x &y are 101.96 &1.96