Proof of the Quadratic Formula through Completing the Square

Interactive Video
•
Mathematics
•
University
•
Hard
Wayground Content
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5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the quadratic formula used for?
Solving linear equations
Finding the roots of quadratic equations
Determining the slope of a line
Calculating the area of a circle
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in completing the square for the equation ax^2 + bx + c = 0?
Add b to both sides
Multiply both sides by a
Factor out a from the equation
Subtract c from both sides
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When completing the square, what do you do with the coefficient of x?
Half it
Double it
Ignore it
Square it
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the common denominator used in the final steps of deriving the quadratic formula?
4a^2
b^2
2a
c
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What operation is performed to isolate x in the quadratic formula derivation?
Division
Addition
Multiplication
Square-rooting
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