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Kvadratinė lygtis

Authored by Jolanta Jankauskienė

Mathematics

9th Grade

Used 42+ times

Kvadratinė lygtis
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Kuri lygtis yra kvadratinė?

x3+5x =0x^3+5x\ =0

3x + 4 +2x =03x\ +\ 4\ +2x\ =0

3x + x2 + 4 =03x\ +\ x^2\ +\ 4\ =0

5(x+2)=2−x5\left(x+2\right)=2-x

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Nurodykite kvadratinės lygties x2+3x−4 =0x^2+3x-4\ =0 koeficientus.

a=0, b=3, c=−4a=0,\ b=3,\ c=-4

a=1, b=3, c=4a=1,\ b=3,\ c=4

a=1, b=3, c=−4a=1,\ b=3,\ c=-4

a=0, b=3, c=4a=0,\ b=3,\ c=4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Jei a=2, b=0, c=25a=2,\ b=0,\ c=\frac{2}{5} , tai kvadratinė lygtis yra:

2x2+25x=02x^2+\frac{2}{5}x=0

x2+2x+25=0x^2+2x+\frac{2}{5}=0

25x2+2x=0\frac{2}{5}x^2+2x=0

2x2+25=02x^2+\frac{2}{5}=0

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Kurios kvadratinės lygties sprendinys yra -2?

x2+2x=0x^2+2x=0

x2−2=0x^2-2=0

x2+3x−1=0x^2+3x-1=0

x2−2x=0x^2-2x=0

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Suvedę lygtį x(3x−4)=−6x\left(3x-4\right)=-6 pavidalu ax2+bx+c=0ax^2+bx+c=0 gausime:

3x−4x+6=03x-4x+6=0

3x2+4x+6=03x^2+4x+6=0

3x2−4x+6=03x^2-4x+6=0

3x2+4x−6=03x^2+4x-6=0

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Kokie kvadratinės lygties −x2+x−3=0-x^2+x-3=0 koeficientai?

a=1, b=1, c=3a=1,\ b=1,\ c=3

a=−1, b=0, c=3a=-1,\ b=0,\ c=3

a=−1, b=0, c=−3a=-1,\ b=0,\ c=-3

a=−1, b=1, c=−3a=-1,\ b=1,\ c=-3

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Kurie iš skaičių -1, 0 ir 3 yra lygties x2+x=0x^2+x=0 sprendiniai?

−1 ir 3-1\ ir\ 3

0 ir 20\ ir\ 2

−1 ir 0-1\ ir\ 0

−1, 0 ir 3-1,\ 0\ ir\ 3

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