Question

Resolva as seguintes equaçoes de x e y
X+y=4
X2-xy=6

Answer 1

X=4-Y 2 (4-Y) - Y (4-Y) = 8 -2Y -4Y+Y^2 = Y^2-6Y +8 = delta= b^2-4×a×c 36- 32=4 = (-b+/- ✅de delta)/2×a =( 6 +/- 2)/2 = x'= (6-2)/2=2 x"= (6+2)/2=4 2+Y=4 Y=4-2 =Y=2 2 (2)-2Y=6 -2y=6-4 y=2/-2 y= -1