√a+8 +(b-27)²=0,求√a² - ³√b
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√a+8 +(b-27)²=0,求√a² - ³√b
√a+8 +(b-27)²=0,求√a² - ³√b
√a+8 +(b-27)²=0,求√a² - ³√b
根据题意得
∴a+8=0
b-27=0
∴a=-8
b=27
∴√a² - ³√b
=8-3
=5