Review Unit 3 Solving Quadratics

What is the standard form for a Quadratic?

• ax²+ bx = - c
• x = -b ± √(b²-4ac) / 2a
• ax² + bx + c
• y = mx + b

What is name of the graph of a Quadratic Equation?

• Line

• exponential

• cubic

• Parabola

Solve the equation using square roots.
x² = 121

• 60.5
• ± 11
• ± 12
• 11

Use the square root property to solve the Quadratic Equation.
x² = -49

• ± 7
• -7
• ± 2401
• ± 7i

Solve the equation using the zero product property.

(x- 9)(x + 3) = 0 Hint: set each factor equal to zero and solve

• x = 3 or x = 9

• x = 3 or x = -9

• x + -3 or x = 9

• x = -3 or x = -9

Solve the equation by factoring.
x² + 13x + 40 = 0

• -8, 5
• -40, -1
• 5, 8
• -8, -5

Use the Quadratic Formula to solve the Quadratic Equation.

x² + 5x - 36 = 0

• -9, 1

• -9, 4

• 9, 4

• 9, -4

Solve by factoring

• -3, 4

• 3, 4

• -4, -3

• -3

Factor and Solve

2x² - 3x - 2 = 0

• x = 1, x = -1

• x = -1/2, x = 2

• x = 1/2, x = 2

• x = 1/2, x = 1

Determine the values of

a, b, and c for

4x² – 8x = 3 Hint: the equation must be equal to 0 to identify a, b and c

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3