Terms
Which of the following polynomial is in standard form?
(a) x2 + 5x = -6
(b) x2 - x + -1 = 1
(c) x2 + 4 = 0
(d) x2 + 15x + 56 = 0
(d) x2 + 15x + 56 = 0
Solve the following quadratic equation by factoring: x2 -4x - 12.
x = -2, 6
Which of the following equations should you use taking the square root to solve for the variable?
(a) x2 - 81 = 0
(b) x2 + 2x - 8
(c) x2 - 7x = 0
(a) x2 - 81 = 0
The form x = -b ± √(b2 - 4ac) / 2a is also known as what?
Discriminant
Solve the following quadratic equation by factoring: x2 + 8x = -16.
x = -4
Solve the following quadratic equation by taking the square root: x2 = 121.
x = ± 11.
Quadratic equations are polynomial equations that have the highest exponent of ____.
(a) 2
(b) 1
(c) 4
(d) 3
(a) 2
Solve the following quadratic equation by factoring: 3x2 = 9x.
x = 0, 3
Solve the following quadratic equation by taking the square root: 3x2 = 6.
x = ± √2
The easiest way to solve a quadratic equation
quadratic formula or factoring
Solve the following quadratic equation by factoring: 9x2 - 45 = 4.
x = ± 7/3
Solve the following quadratic equation by taking the square root: x2 + 18 = 54.
x = ± 6
Solve the following quadratic equation by factoring: x2 - 14x - 72.
x = -4, 18
Solve the following quadratic equation by taking the square root: (x + 1)2 = 3.
x = -1 ± √3