Bài 7 trang 10: Tính căn bậc 2
Lớp 9 SGK Toán tập 1

Bài 7 trang 10: Tính căn bậc 2

Hướng dẫn giải:

a.  $\sqrt{(0,1)^{2}}=\left | 0,1 \right |=0,1$

b.  $\sqrt{(-0,3)^{2}}=\left | -0,3 \right |=0,3$

c.  $-\sqrt{(-1,3)^{2}}=-\left | -1,3 \right |=-1,3$

d.  $-0,4\sqrt{(-0,4)^{2}}=-0,4\left | -0,4 \right |=-0,16$

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Hi, I'm David Smith

I'm David Smith, husband and father , I love Photography,travel and nature. I'm working as a writer and blogger with experience of 5 years until now.

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