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Yhtälöt 2 8lk

Authored by Aulis Miettinen

Mathematics

8th Grade

Used 1+ times

Yhtälöt 2 8lk
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13 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

x2 =25

x= 12,5

x=5 tai x=-5

x= 625

x= 50

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 x2=64x^2=64  

x=32

x= 128

x= 8 tai x= -8 

x= 12

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2x2 = 50

x= 5 tai x= -5

x= 25

x= 100

7,1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 ±72 \pm\sqrt{72\ }  on ratkaisu yhtälölle



x : 2 =36

x+6= 78

2x =144

 x2=72x^2=72  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 x2=481x^2=\frac{4}{81}  

 x=±29x=\pm\frac{2}{9}  

 x=±169x=\pm\frac{16}{9}  

x= 2

 x=±1681x=\pm\frac{16}{81}  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 x2=49x^2=-49  

 x=±7x=\pm7  

 x=±24,5x=\pm24,5  

 x=±9x=\pm9  

ei ratkaisua

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Millä yhtälöllä ratkaiset tehtävän:

Kun erääseen lukuun lisätään 23 saadaan 72. Mikä luku on kyseessä?

x×23=72x\times23=72

72+23 =x

x+23 = 72

49

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