Question

|√3+√2|-|√3-√2|已知|x-1|+|y+3|=0,求x^1993+y^2的值先化简再求值：(a+b)(a-b

Answer 1

1) 2√2

2) x=1 y=-3

x^1993+y^2=1+9=10

3) (a+b)(a-b)+b(b-2)=a^2-2b=2-(-2)=4

4) (√3)^2+4*(-1/2)-2^3=3-2-8=-7

5) (-2)^3+1/2(2004-√3)^0-|-1/2|=-8+1/2-1/2=-8