a,b互为相反数,c,d互为倒数,e的绝对值是2
a+b=0
cd=1
e²=4
e=±2
x=3a+3b/e+2cd+1/2e^2
x=0+2+2
x=4
9x^2+[4x^2-3x^2-2(x^2-3x)]
=9x²+4x²-3x²-2x²+6x
=10x²+6x
=160+24
=184