Question

计算题(详细过程)

³根号1000-|³根号-125+根号（-11）²-根号（2分之5）²-4
x+2分之1-x²-4分之x-x²-4x+4分之2
（x²-2x分之x+2-x²-4x+4分之x-1）÷x²-2x分之x-4

Answer 1

234695/(12346²-12345×312347)
=234695/[12346²-(12346-1)×(12346+1)]
=234695/[12346²-(12346²-1)]
=234695/1
=234695
求采纳为满意回答。

Answer 2

1、=10-|-5 | +11-5/2-4
=10-5+11-5/2-4
=10又1/2

2、=1/(x+2) -x/(x+2)(x-2)-2/(x-2)²
=[(x-2)-x]/(x+2)(x-2) -2/(x-2)²
=-2/(x+2)(x-2) -2/(x-2)²
=-2[(x-2)-(x+2)]/(x+2)(x-2)²
=8/(x+2)(x-2)²

3、[(x+2)/x(x-2) -(x-1)/(x-2)²]×x(x-2)/(x-4)
=(x+2)/(x-4) +x(x-1)/(x-2)(x-4)
=[(x+2)(x-2)+x(x-1)]/(x-2)(x-4)
=(2x²-x-4)/(x²-6x+8）