|2a+1+4|*|b-4|+(c+1)²=0
|2a+5|*|b-4|+(c+1)²=0
c+1=0
c=-1
2a+5=0或b-4=0
a=-5/2或b=4
9a²b²-{ac²-【6a²b²+(4a²c-3ac²)】-6a²c}=9a²b²-{a-【6a²b²-4a²-3a】+6a²}
=15a²b²-10a²-4a
分别代入a和
|2a+1+4|*|b-4|+(c+1)²=0
|2a+5|*|b-4|+(c+1)²=0
c+1=0
c=-1
2a+5=0或b-4=0
a=-5/2或b=4
9a²b²-{ac²-【6a²b²+(4a²c-3ac²)】-6a²c}=9a²b²-{a-【6a²b²-4a²-3a】+6a²}
=15a²b²-10a²-4a
分别代入a和