Math 9 Q1 - Unit Test

It is a polynomial equation of degree two that can be written in the form a x² + bx + c = 0, where a, b, and c are real numbers and a ≠ 0.

• Quadratic Inequality

• Quadratic Equation

• Linear Inequality

• Linear Equation

Which of the following equations is quadratic?

• 6x² + x³ + 4 = 0

• 10- 7x = 0

• 4y + 8 = 0

• 16 + r² = 8r

In the quadratic equation x² - x - 12 = 0, what are the values of a, b, and c?

• a = 1, b = 0, c = -12

• a = 1, b = -1, c = -12

• a = -3, b = 0, c = -12

• a = 3, b = 0, c = 12

In the quadratic equation 3x² - 7x + 1 = 0, which is the quadratic term?

• x²

• -7x²

• -7x

• 3x²

In the quadratic equation x² - 5x + 6 = 0?, which is the constant term?

• x²

• -5

• 6

• -5x

What is the standard form of the quadratic equation 5x (x + 2) = 1?

• 5x² + 10x - 1 = 0

• 5x² + 2x - 1 = 0

• 5x² + 10x + 1 = 0

• x² + 10x = 1

What method can we use to solve a quadratic equation that can be written in the form x² = r?

• Quadratic Formula

• Extracting Square Roots

• Completing the Square

• Factoring

Solve for x in the equation x² = 144 by extracting square roots.

• 14 and -14

• 16 and -16

• 23 and -23

• 12 and -12

The length of a swimming pool is 6m longer than its width. It's area is 40m². How will you represent the equation if x = the width?

• (x - 6) (x) = 40

• (x + 6)(x) = 40

• x² - 6x + 40 = 0

• x² - 6x - 40 = 0

Which of the following states that if the product of two real numbers is zero, then either of the two is equal to zero or both numbers are equal to zero?

• Multiplication Property

• Identity Property

• Zero Product Property

• Transitive Property