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teste 9° ano

Authored by Mauricio Milleky Junior

Mathematics

9th Grade

Used 5+ times

teste 9° ano
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10 questions

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1.

MATCH QUESTION

1 min • 1 pt

Organize as equações a seguir relacionando-as com os valores dos seus coeficientes a , b e c .

a=1

b=(-6)

c=2

x2−4x=0x^2-4x=0

a=1

b=4

c=(-21)

x2−6x+2=0x^2-6x+2=0

a=1

b=4

c=0

x2+4x−21=0x^2+4x-21=0

a=2

b=(-1)

c=6

2x2−x+6=02x^2-x+6=0

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Qual o valor dos coeficientes a , b e c na equação −2x2−3x +72=0-2x^2-3x\ +72=0 ?

a=(-2)

b=(-3)

c=72

a=1

b=(-3)

c=72

a= x2x^2

b=x

c=72

a=(-3)

b=(-2)

c=(-72)

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual o resultado para a equação 2x2−72=02x^2-72=0 ?

0 e 36

±18\pm18

±6\pm6

0 e 6

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual o resultado para a equação x2−25=0x^2-25=0 ?

±15\pm\sqrt[]{15}

±5\pm5

±15\pm15

±50\pm50

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual o resultado para a equação 3x2−12x=03x^2-12x=0 ?

±2\pm2

0 e 4

±4\pm4

3 e -12

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Qual o resultado para a equação 5x2−40x=05x^2-40x=0 ?

±4\pm4

0 e 8

±8\pm\sqrt[]{8}

5 e -40

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Qual o resultado para a equação completa do 2° grau x2−9x+18=0x^2-9x+18=0 ?

0 e -6

1, -9 e 18

-3 e 6

3 e 6

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