[-(1/2)的平方*4]的三次方-|-5|;

问题描述:

[-(1/2)的平方*4]的三次方-|-5|;
-81/ 9/4*(-4/9)/(-16);
x-{y+[3x-2(y+2x)+5y]-3x}

[-(1/2)的平方*4]的三次方-|-5|;
=[-1/4*4]的3次方-5
=-1-5
=-6
-81/ 9/4*(-4/9)/(-16);
=-36*(-4/9)/(-16)
=-16/16
=-1
x-{y+[3x-2(y+2x)+5y]-3x}
=x-{y+[3x-2y-4x+5y]-3x}
=x-{y+3y-x-3x}
=x-4y+4x
=5x-4y