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Math 9_Q1_Periodic Test

Quiz by CID Marikina

Grade 9
Mathematics
Philippines Curriculum: Grades K-10 (MELC)

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50 questions
Show answers
  • Q1

    Which of the following illustrates a quadratic equation?

    x + 5 = 0

    7 – 4x >  x2
    2x – x2  = 9
    6x2 + 18 – 12x
    30s
    M9AL-Ia-1
  • Q2

    What will happen if a = 0 in the standard form of quadratic equation, 𝑎𝑥2 + bx + c = 0 ?

    The equation becomes linear.
    The equation is still quadratic.
    The degree of the equation remains 2.

    The equation becomes an inequality.

    30s
    M9AL-Ia-1
  • Q3

    Determine the solution set of 𝑥2  - 144 = 0 using extracting the square roots.

    √144
    x2= 144  

    144

    {12, -12}
    30s
    M9AL-Ia-b-1
  • Q4

    What values of x will make the quadratic equation 3𝑥2 = 75  TRUE?

    225
    \pm 5
    \pm  25

    72

    30s
    M9AL-Ia-b-1
  • Q5

    Which of the following are the factors of the quadratic equation x2 - 12x + 20 = 0? 

    (x - 1) (x - 20)

    (x +12) (x + 20)

    (x - 10) (x - 2)
    (x - 4) (x - 5)
    30s
    M9AL-Ia-b-1
  • Q6

    Determine the positive root of the quadratic equation x2 + 5x - 6 = 0.

    1
    11
    6

    -30

    30s
    M9AL-Ia-b-1
  • Q7

    To solve by completing the square, what would be the constant term in the quadratic equation x2 - 5x + _____ = 0?

    1/2

    5/2
    25
    25/4
    30s
    M9AL-Ia-b-1
  • Q8

    In the process of completing the square, what must be the initial step if the first term has acoefficient greater than one?

    Multiply all terms by zero

    Move it to the other side

    Divide both sides by this coefficient
    Multiply both sides by this coefficient
    30s
    M9AL-Ia-b-1
  • Q9

    What is the quadratic formula?

    ax2  + bx + c = 0
    \frac{-b\ \pm\ \surd b^2\ -\ 4ac}{2a}
    b2 - 4ac  

    \left(\frac{b}{2}\right)^2

    30s
    M9AL-Ia-b-1
  • Q10

    Using quadratic formula, what are the roots of 𝑥2+ 15 =− 8 ?

    {7, -7}
    {-3, -5}

    {23, -23}

    {-1, -15}
    30s
    M9AL-Ia-b-1
  • Q11

    The nature of the roots depends on the value b2 − 4ac and it is known as the ______.

    discriminant
    quadratic formula

    quadratic equation

    standard form
    30s
    M9AL-Ic-1
  • Q12

    Describe the discriminant and nature of the roots of 3x2 + 5x - 2 = 0.

    The discriminant has two real roots.

    The discriminant is greater than 0 and is a perfect square, the two roots are real andrational.
    The discriminant has no real roots.
    The discriminant is greater than 0 and is not a perfect square, the two roots are real and irrational.
    30s
    M9AL-Ic-1
  • Q13

    In the quadratic equation 3𝑥 2  - 5x +  4 = 0, what is the sum of its roots?

    4/3
    5/3
    -8

    12

    30s
    M9AL-Ic-2
  • Q14

    Solve for the sum and product of the roots of the quadratic equation 2x2 + 7x - 5 = 0.

    Sum = 9, Product = -10
    B. Sum =5/2 , Product = 7/2
    Sum =-7/2, Product =-5/2

    Sum = 4, Product = - 70

    30s
    M9AL-Ic-2
  • Q15

    Which equation has roots whose sum is -7 and whose product is -10?

    x2- 2x - 5 = 0 

    x2- 17x + 70 = 0
    x2- 3x - 5 = 0
    x2 + 7x - 10 = 0
    30s
    M9AL-Ic-2

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