ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Mathematics and Statistics Assessment Videos 200 videos
What is the equation of the line graphed above?
A line passes through the point (-4, -4) and has a slope of . What is its equation?
Line A has an x-intercept of -4 and a y-intercept of 8. What is its slope?
TSI Math: Using the Quadratic Formula to Solve an Equation 14 Views
Share It!
Description:
What is the solution to the quadratic equation 5x² = 5x – 1?
- 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 members here we go Another quadratic for
- 00:04
you what's The solution to the quadratic equation Five x
- 00:08
squared equals five x minus one All right let's Get
- 00:14
started on that Well the first step in the solution
- 00:16
of any quadratic equation is this factoring thing and getting
Full Transcript
- 00:19
the zero thing always the first step So burn it
- 00:22
into your mind and then add lotion Alright then subtract
- 00:26
five x minus one from both sides that gets us
- 00:28
five x squared minus five Acts plus 1 equal zero
- 00:32
There are no factors of well five and one they're
- 00:35
equalling five that add up to negative five Right So
- 00:39
we need to use the quadratic formula if age coefficient
- 00:42
of x squared b is the coefficient of acts and
- 00:45
c is the constant term and one side of the
- 00:48
quadratic equations he called zero Well here we go Here's
- 00:50
the formula your old friend and mine So it's going
- 00:53
to substitute a equals five there and b equals negative
- 00:57
five and c equals one that gets us access squirrels
- 01:01
uh minus minus five plus or minus square root of
- 01:04
negative five squared minus four times five times one over
- 01:08
in it will simplify the numerator and the denominator would
- 01:11
get five plus or minus square root of twenty five
- 01:13
moneys twenty all over ten keep simplifying We've got five
- 01:17
plus or minus square with five over ten or five
- 01:21
tense plus or minus escrow to five or ten or
- 01:23
just one half plus or minus the square to five
- 01:26
over ten There we go notice that we can't simplify
- 01:28
the fraction square with five over ten Although five is
- 01:31
a factor of five it isn't a factor of the
- 01:33
square root of fives Where we have five isn't a
- 01:35
factory and either So There are no common factors here
- 01:38
to cancel in this fraction The right answer here is
- 01:41
one half plus or minus a square with a five
- 01:43
over ten it's b and that's it bye for quadratic 00:01:47.126 --> [endTime] for now good bed No
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?