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QUADRATIC EQUATIONS

Quiz by Angkol

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25 questions
Show answers
  • Q1

    Which of the following is a quadratic equation?

    x = 3

    2 – x2 = 0

    x – 2 = 0

    x3 – 2x + 1 = 0

    15s
  • Q2

    What is the standard form of the equation 4x = 3x2 – 2?

    3x2 + 4x – 2 = 0

    3x2 – 4x + 2 = 0

    3x2 + 4x + 2 = 0

    3x2 – 4x – 2 = 0

    15s
  • Q3

    What are the values of a, b, c of the equation in 3x2 - 4x - 2 = 0

    a = 3, b = -4, c = -2

    a = 3, b = 4, c = 2

    a = 3, b = 4, c = -2

    a = 3, b = -4, c = 2

    15s
  • Q4

    Which of the following is NOT a method of solving quadratic equations?

    quadratic formula

    quadratic surd

    factoring

    completing the square

    15s
  • Q5

    In any quadratic equations, how many possible roots are there?

    infinite

    0

    2

    1

    15s
  • Q6

    How many possible real roots are there in the equation x2 = k, where k < 0?

    infinite

    1

    2

    0

    15s
  • Q7

    Which of the following is the quadratic formula?

    x=\frac{-b\pm\sqrt{b^2}-2ac}{2a}

    x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

    x=\frac{b\pm\sqrt{b^2-4ac}}{2a}

    x=\frac{-b\pm\sqrt{b^2-4ac}}{2}

    15s
  • Q8

    What property states that “If the product of two numbers is zero, then either of the two is equal to zero or both numbers are equal to zero.”?

    Inverse property

    Reflexive property 

    Zero product property

    Identity property   

    15s
  • Q9

    What is the most appropriate method to use in solving the equation x2 = k, where k  0?

    extracting square root

    completing the square

    Quadratic surd

    factoring

    15s
  • Q10

    Below are the steps in solving quadratic equations by using the quadratic formula. Arrange the steps in order.

                            I. Determine the values of a, b and c.

                            II. Check the solution.

                            III. Write the equationin standard form.

                            IV. Simplify the result.

                            V. Substitute the valuesof a, b, and c in the quadratic formula.

    III, IV, I, V, II

    III, I, V, IV, II

    V, IV, III, II, I

    I, II, III, IV, V

    15s
  • Q11

    In completing the square, what happens to the equation when both sides are added by square of one-half of the coefficient of x?

    It becomes some and difference of two squares.

    It becomes perfect square binomial.

    It becomes perfect square.

    It becomes perfect square trinomial.

    15s
  • Q12

    Which of the following is a perfect square trinomial?

    x2 – 2x – 1

    x2 + 2x + 1

    x2 + 3x + 4     

    x2 – 3x + 4

    15s
  • Q13

    How many real roots does the quadratic equation x2+ 5x + 7 = 0 have?

    2

    infinite

    0

    1

    20s
  • Q14

    How many real roots does the quadratic equation x2 = 16?

    2

    0

    infinite

    1

    20s
  • Q15

    What will be added to the equation x2+ 20x + _____ to make it a perfect square trinomial?

    200

    20

    100

    10

    20s

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