ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
TSI Math Videos 144 videos
f(x) = 3ˣ. Which of the following equations must be true?
TSI Math: Recognizing the Axis of Symmetry in a Quadratic Equation 8 Views
Share It!
Description:
What is the axis of symmetry of the parabola given by the equation -3x² + 42x – y = 0?
What is the axis of symmetry of the parabola given by the equation -3x² + 42x – y = 0?
- Test Prep / TSI
- Intermediate Algebra and Functions / Quadratic and Other Polynomial Expressions, Equations, and Functions
- TSI / TSI Math
- TSI / TSI Mathematics
- TSI Mathematics / Intermediate Algebra and Functions
- Intermediate Algebra and Functions / Quadratic and Other Polynomial Expressions, Equations, and Functions
- Test Prep / TSI
- TSI Math / Intermediate Algebra and Functions
Transcript
- 00:02
Okay sy mass Shmoop for what is the axis of
- 00:04
symmetry of the parabola given by the equation Negative three
- 00:08
x squared plus forty two x minus y equals zero
- 00:14
Okay well first things first let's Add why to both
- 00:17
sides to write the given equation in standard form right
Full Transcript
- 00:20
y equals mx plus b So here it is y
- 00:23
equals negative three x squared plus forty two x What
- 00:26
when a quadratic equation is written in the form why
- 00:29
equals a x squared plus b x plus c the
- 00:32
access of symmetry by definition here is the line x
- 00:37
equals negative b over two a and like you just
- 00:40
had to know that formula The vertical line passes through
- 00:43
the vertex in the middle of the problem right there
- 00:47
So here b is forty two and a is well
- 00:52
negative three so we've got negative forty two overnegative six
- 00:56
there and that equals seven So thie axis of awesome
- 01:01
for the given parable of there is x equal seven
- 01:05
and that's it The answer is c
Related Videos
Which is the best way to revise and combine sentences 1 and 2?
Where would the following sentence best be placed?
Which of the following is best to insert at the beginning of sentence 8?
Which is the best location for sentence 9?
Which of the following sentences is best to insert between sentences 11 and 12?