Expressing Roots of Quadratic Equations
Not what you're looking for?
If (x + 2)(x - 4) = 0 indicates that x + 2 = 0 or x - 4 = 0, explain why (x + 2)(x - 4) = 6 does not mean x + 2 = 6 or x - 4 = 6. Could we solve the equation using x + 2 = 3 and x - 4 = 2 because (3)(2) = 6?
Purchase this Solution
Solution Summary
The allowable expressions for roots of quadratic equations are explained. An equation is solved.
Solution Preview
First let us understand why (x + 2)(x - 4) = 0 indicates that x + 2 = 0 or x - 4 = 0
From the properties of numbers, we know that, any real number multiplied by zero results zero.
i.e., a*0=0 for any real number a.
Product of any two non zero numbers yields us a non ...
Purchase this Solution
Free BrainMass Quizzes
Multiplying Complex Numbers
This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.
Probability Quiz
Some questions on probability
Exponential Expressions
In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.
Geometry - Real Life Application Problems
Understanding of how geometry applies to in real-world contexts
Graphs and Functions
This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.