a) a+5|+|b-2|=0
a+5 + b-2
TH1:a + 5 = 0
a = 0 - 5
a = -5
TH2:b-2=0
b=0+2
b=2
Vậy a = -5, b= 2
b) |a-2017|+|b-2018| = 0
a-2017 + b-2018 = 0
TH1: a - 2017 = 0
a = 0+2017
a = 2017
TH2: b - 2018 =0
b = 0+2018
b = 2018
Vậy a = 2017, b = 2018
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