Question

PLEASE HELP
Part 1: Using complete sentences, explain what the discriminant is and what it tells you about the solutions of a quadratic equation.
Part 2: Provide a unique example to back up your explanation.

Answer 1

1. The discriminant formula is b² - 4ac. It gives information about the nature of the roots of the polynomial. See more in this link: http://en.wikipedia.org/wiki/Discriminan …

2. The example of discriminant that determines the nature of the roots is...

x² + 2x + 1 = 0

a = 1
b = 2
c = 1

b² - 4ac
2² - 4*1*1
= 4 - 4
= 0

Since b² - 4ac = 0, this gives us a real root.

Answer 2

quadratic formula comes from completing square method

Answer 3

so can you help me @dan815