It is known that there are three mutually unequal rational numbers 1, a + B, a, which can be expressed as 0, B / A, B, and | x | = 2, Find (a + b) 2 + (AB) 3 - (a + b-ab) + X & # 178;
The fraction B / A is meaningful, a ≠ 0, so only a + B = 0
b=-a b/a=-1
a=-1 b=1
|x|=2 x²=4
(a+b)²+(ab)³-(a+b-ab)+x²
=0²+[(-1)×1]³-[0-(-1)×1]+4
=0-1-1+4
=2
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