Quadratic Equation Part 2

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Q 1/20
Score 0
What is a discriminant?
29
The discriminant helps tell you the nature of roots of a quadratic equation.
The discriminant helps tell you the trend of the graph of a quadratic equation.
The discriminant helps tell you the solution of a quadratic equation.
The discriminant helps tell you the vertex of a quadratic equation.

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20 questions

Show answers

Q1
What is a discriminant?
The discriminant helps tell you the nature of roots of a quadratic equation.
The discriminant helps tell you the trend of the graph of a quadratic equation.
The discriminant helps tell you the solution of a quadratic equation.
The discriminant helps tell you the vertex of a quadratic equation.
30s
Q2
How do we get the discriminant of quadratic equations?
By substituting the values a, b and c in b²– 4ac.
By substituting the values a, b and c in $\left(\frac{b}{2}\right)^2$
By substituting the values a, b and c in $\frac{c}{a}$
By substituting the values a, b and c in $\frac{-b}{2a}$
30s
Q3
What is the nature of roots if the discriminant is -5?
The equation has no real roots.
The roots are irrational number and are not equal.
The roots are real numbers and are equal.
The roots are rational numbers but are not equal.
30s
Q4
What is the discriminant of the quadratic equation 3x² – 2x + 5 = 0?
64
48
-48
-56
30s
Q5
Your classmate says that the quadratic equation 2x² + 5x – 5 = 0 has two rational and unequal roots because the value of its discriminant is positive. Do you agree with your classmate?
No, because the discriminant is -25
No, because the roots are unequal irrational numbers.
No, because the roots are equal rational numbers
Yes, because the discriminant is 65
30s
Q6
How do we get the sum of the roots of quadratic equations?
By substituting the values a, b and c in $\frac{c}{a}$ .
By substituting the values a, b and c in $\left(\frac{b}{2}\right)^2$ .
By substituting the values a, b and c in b²– 4ac.
By substituting the values a, b and c in $\frac{-b}{a}$
30s
Q7
How do we get the product of quadratic equations?
By substituting the values a, b and c in b²– 4ac.
By substituting the values a, b and c in $\frac{-b}{a}$ .
By substituting the values a, b and c in $\frac{c}{a}$ .
By substituting the values a, b and c in $\left(\frac{b}{2}\right)^2$ .
30s
Q8
What is the sum of the roots of 4x² –100 = 0?
100
25
0
4
30s
Q9
Your classmate says that the standard form of the quadratic given the roots -3 and15 is quadratic x² + 12x – 45=0. Do you agree with your classmate?
Yes, the quadratic equation is x² +12x – 45=0.
No, the quadratic equation is x² –12x – 45=0.
No, the quadratic equation is x² + 12x + 45=0.
No, the quadratic equation is x² –12x + 45=0.
30s
Q10
What do you call to a solution of an equation derived from an original equation, however not a solution of the original equation?
extraneous root
square root
positive root
negative root
10s
Q11
10s
Q12
Which of the following rational algebraic equations is transformable into a quadratic equation?
$\frac{3}{m-2}+\frac{4}{m+2}=\frac{7}{m}$
$\frac{w+1}{2}-\frac{w+2}{4}=7$
$\frac{2}{p}+\frac{3}{p+1}=5$
$\frac{2q-1}{3}+\frac{1}{2}=\frac{3q}{4}$
45s
Q13
45s
Q14
What is the standard form of equation x(x+2) +2(x-2) = 1 when transformed to a quadratic equation?
x²+ 4x – 2 = 0
x² + 2x – 5 = 0
x²+ 4x - 5=0
x² + 2x - 2 = 0
30s
Q15
Which of the following is a solution of (x + 3)(x + 4) = 20?
{3, 4}
{1, -8}
{-1, 8}
{-3, -4}
30s

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Quadratic Equation Part 2

Quiz by Angkol

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