Teza clasa a VII-a sem.II
5 months ago
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18 QuestionsShow answers
  • Question 1
    120 seconds
    Q.

    Rezultatul calculului: (2√3-1)(2√3+1) -(-2)3

    answer choices

    27

    3

    19

    5

  • Question 2
    300 seconds
    Q.

    Rezultatul calculului: (2x+1)2 - (x-2)2 -3x(x+3)

    answer choices

    x-3

    -x+3

    -x-3

    -9x+5

  • Question 3
    120 seconds
    Q.

    Descompus in factori (2x-3)2 -4(x+1)2

    answer choices

    5(1-4x)

    1-4x

    5(4x-1)

    4x-1

  • Question 4
    120 seconds
    Q.

    Solutia reala a ecuatiei 3x-5=-8

    answer choices

    1

    -1

    4

    -6

  • Question 5
    180 seconds
    Q.

    Multimea solutiilor ecuatiei (x+1)2 -1=3

    answer choices

    1; 3

    3; -2

    -3; 1

    -3; 2

  • Question 6
    180 seconds
    Q.

    Valorile intregi nenule ale lui x pentru care | 2x - 1 |≤3

    answer choices

    {1; 2}

    {-1; 0; 1; 2}

    {-1; 1; 2}

    {-2; -1; 1}

  • Question 7
    60 seconds
    Q.

    Descompus in factori x2 - 4x +4

    answer choices

    (x - 2)2

    (x + 2)2

    (x - 2)(x + 2)

    (x - 4)2

  • Question 8
    60 seconds
    Q.

    Descompus in factori x2 - 5x + 6

    answer choices

    (x - 6)2

    (x + 2)(x - 3)

    (x - 2)(x + 3)

    (x - 2)(x - 3)

  • Question 9
    180 seconds
    Q.

    Daca suma a doua numere este 87, iar diferenta lor este 55, numerele sunt:

    answer choices

    62 si 15

    16 si 71

    71 si 16

    15 si 62

  • Question 10
    180 seconds
    Q.

    Un triunghi dreptunghic cu o cateta de 6 cm si ipotenuza de 10 cm are perimetrul egal cu:

    answer choices

    24 cm

    22 cm

    20 cm

    25 cm

  • Question 11
    120 seconds
    Q.

    Latura unui patrat cu diagonala de 4√2 cm are lungimea egala cu:

    answer choices

    8 cm

    8√2 cm

    4 cm

    2

  • Question 12
    60 seconds
    Q.

    Inaltimea intr-un triunghi echilateral cu latura de 4 cm, are lungimea egala cu:

    answer choices

    2 cm

    2√3 cm

    √3 cm

    4√3 cm

  • Question 13
    180 seconds
    Q.

    Daca ΔABC este dreptumghic, cu m(∢A)=90°, AB = 6 cm si cos (∢B) = ¾ atunci BC are lungimea egala cu:

    answer choices

    12 cm

    9 cm

    10 cm

    8 cm

  • Question 14
    180 seconds
    Q.

    Aria unui triunghi dreptunghic isoscel care are ipotenuza de 10 cm este:

    answer choices

    25 cm2

    50 cm2

    100 cm2

    20 cm2

  • Question 15
    120 seconds
    Q.

    ΔABC are AB=6cm, BC=8cm si m(∢B)=30°. Aria triunghiului este egala cu:

    answer choices

    12√3 cm2

    12 cm2

    24 cm2

    24√3 cm2

  • Question 16
    120 seconds
    Q.

    Aria unui trapez cu inaltimea de 5cm si linia mijlocie 14 cm este egala cu:

    answer choices

    35 cm2

    70 cm2

    140 cm2

    19 cm2

  • Question 17
    180 seconds
    Q.

    Perimetrul unui romb cu diagonalele de 16 cm si 12 cm este egal cu:

    answer choices

    48 cm

    50 cm

    40 cm

    56 cm

  • Question 18
    60 seconds
    Q.

    3⋅sin 30° − cos 60° este egal cu:

    answer choices

    1

    3

    √3

    ½

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