Question

9x(x_y)+3(x_y),=12 ce valori pot lua x si y

Answer 1

(x-y)(9x+3)=12 3(x-y)(3x+1)=12 (x-y)(3x+1)=4 4=1x4=2x2=4x1 x-y=1 3x+1=4, 3x=1, x=1 x-y=1, y=0 x-y=2 3x+1=2, 3x=1 x=1/3 nu apartine N, nu convine solutia x-y=4 3x+1=1, 3x=0, x=0 y=-4 nu apartine N