Help with solve



Hello!

How I can obtain the result for the following problem:
r1:abs(a00-4*a02)=1;
r2:abs(a00-4*a01+4*a02)=1;
r3:abs(a00+4*a01+4*a02)=1;
solve([r1,r2,r3],[a00,a01,a02]);

Currently I obtain 
[]

But when I compute this in Maple I obtain
{a02 = 0, a01 = 0, a00 = 1},
{a02 = -1/8, a01 = -1/4, a00 = 1/2},
{a02 = -1/8, a00 = 1/2, a01 = 1/4},
{a00 = 0, a01 = 0, a02 = -1/4},
{a00 = 0, a01 = 0, a02 = 1/4},
{a01 = -1/4, a02 = 1/8, a00 = -1/2},
{a01 = 1/4, a02 = 1/8, a00 = -1/2},
{a02 = 0, a01 = 0, a00 = -1}

How I can compute it in maxima?

I'm very beginner in maxima.
Thank you very much in advance.

Best wishes,
Zbigniew