17x-5=11a 17x=11a+5 x=(11a+5)/17
x-2a=3 x=3+2a
解相同 3+2a=(11a+5)/17
即 51+34a=11a+5
23a=-46 a=-2
a=-2 b=2 c=-1/2
2ab-(a2+c2)/1 =2*(-2)*(2)-(4+1/4)/1
=-8-4/17=-140/17
17x-5=11a 17x=11a+5 x=(11a+5)/17
x-2a=3 x=3+2a
解相同 3+2a=(11a+5)/17
即 51+34a=11a+5
23a=-46 a=-2
a=-2 b=2 c=-1/2
2ab-(a2+c2)/1 =2*(-2)*(2)-(4+1/4)/1
=-8-4/17=-140/17