Question

x+y=12 si x*y=32 aflati x si y

Answer 1

fie y=32/x

x+32/x=12 |inmultim cu x

x²+32=12x

x²-12x+32=0

x²-8x-4x+32=0

x(x-8)-4(x-8)=0

(x-4)(x-8)=0

x1=4

x2=8