丨2a-4丨+(2a+3b-13)²=0

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丨2a-4丨+(2a+3b-13)²=0

丨2a-4丨+(2a+3b-13)²=0
丨2a-4丨+(2a+3b-13)²=0

丨2a-4丨+(2a+3b-13)²=0
丨2a-4丨+(2a+3b-13)²=0 怎么解?
2a =4
2a+3b-13 =0
3b = 13-4 = 9
b=3
a=2