Math 9-Quadratic-1st quarter

Which of the given equation is linear?

• 2x²+4x-10=0

• 4x+8=5

• x(x-4)=6

• x²+5x-14=0

Which of the following is a quadratic equation?

• 25 - r² = 4r

• 2x² - 4x + 8

• 2(4x - 3) = 0

• 2y - 4x =10

Which of the following quadratic equations can be solved easily by extracting the square roots?

• x² + 7x +12 = 0

• 2w² + 7w - 3 = 0

• 3v² + 2v - 8 = 0

• 4t² - 9 = 0

Which of the following quadratic equations is equal to x (x + 3) - 5 = 0?

• x² + 3x + 5 = 0

• x² + 3x - 5 = 0

• x² - 3x - 5 = 0

• x² - 3x + 5 = 0

What is the nature of the roots of the roots of a quadratic equation if the value of its discriminant is equal to zero?

• The roots are rational and unequal

• The roots are not real

• The roots are irrational and unequal

• The roots are rational and equal

What is the nature of the roots of the roots of a quadratic equation if the value of its discriminant is less than zero or negative?

• The roots are rational and unequal

• The roots are not real

• The roots are irrational and unequal

• The roots are rational and equal

In the equation 2x² - 5x + 1 = 0, what is the value of a, b and c?

• a = 2x² , b = -5x , c = 1

• a = 2 , b = 5 , c = 1

• a = 2 , b = -5 , c = 1

• a = -2 , b = -5 , c = -1

This method of solving quadratic equations transforms the equation in the form, ax² + bx = c, what method is this?

• Extracting the square roots

• Factoring

• Completing the square

• None of the above

Which of the following is the solution set of the equation y = x² + 3x + 2?

• -1 and -2

• 1 and 2

• -1 and 2

• 1 and -2

What is the graph of a quadratic function?

• line

• zigzag

• parabola

• circle