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Cubic root of seventh grade mathematics
Reference answer

1、∵ 13? & lt 170< 14?

∴a= 13

The arithmetic square root of 400 is 20.

∴ b-3 1=20

∴b=5 1

∴a+b=64

The cube root of ∴a+b is 4.

2. answer c

According to the meaning of the question:

2a+3=0，b+2=0。

∴ a=-3/2，b=-2

∴ab=3

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