Question

rozwiąż równanie x*y=16 x+y=10

Answer 1

x*y=16

x=10-y

 

(10-y)y=16

10y-y²-16=0

-y²+10y-16=0

Δ=100-4*(-1)*(-16)=36

√Δ=6

y1=(-10-6)/(-2)=8

y2=(-10+6)/(-2)=2

 

x=10-y

x1=10-y1=10-8

x1=2

y1=8

 

x2=10-y2=10-2=8

x2=8

y2=2