Question

Solve the simultaneous equation
XY=4;x+y=5

Answer 1

Answer:

If X=1 ; Y=4

If X=4 ; Y=1

Step-by-step explanation:

XY=4

X=4/Y

X+Y=5

X+4/Y=5

(X²+4)/X =5

X²+4=5X

X²-5X+4=0

(X-1)(X-4)=0

IF X=1 ; Y=4

IF X=4 ; Y=1