2007-01-28 05:58:53 · 5 answers · asked by ampmxxvii 1 in Science & Mathematics ➔ Mathematics
xy+y=yx
xy+y-yx=0
Factor d left:
y(x+1-x)=0
y(1)=0
There4--->y=0
x belongs to R,means x can be what ever.
!
2007-01-28 06:08:19 · answer #1 · answered by Anonymous · 2⤊ 0⤋
y must equal 0 because 'xy' and 'yx' are the same thing. The only way the equation is true is y=0. X can be anything.
2007-01-28 14:09:27 · answer #2 · answered by crazydave 7 · 2⤊ 0⤋
y=0
2007-02-01 13:57:45 · answer #3 · answered by JAMES 4 · 0⤊ 0⤋
xy + y = yx
Multiplication is commutative; yx = xy, so
xy + y = xy
Subtract xy both sides,
y = 0
Therefore, the solution is
x = t (for some real number t)
y = 0
2007-01-28 14:08:42 · answer #4 · answered by Puggy 7 · 2⤊ 0⤋
Subtract xy from both sides:
y=xy-xy
y=0
2007-01-28 14:10:51 · answer #5 · answered by Anonymous · 1⤊ 0⤋