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ACT Mathematics Videos 164 videos
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
ACT Math: Intermediate Algebra: Drill 3, Problem 1. Find the fifth number in the series.
ACT Math: Pre-Algebra Drill 1.2. What proportion of Jenna's day is spent Wii-swimming?
ACT Math 2.4 Elementary Algebra 251 Views
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Description:
Elementary Algebra Drill 2: Problem 4. Factor the expression.
Transcript
- 00:02
Time for your daily dose of Shmoop...this won't hurt a bit.
- 00:06
Factor 4x squared y plus
- 00:08
16xy plus 12x squared plus 48x
- 00:12
And here are the potential answers...
- 00:18
Okay we have ourselves another factoring
Full Transcript
- 00:20
problem. What's the common thread or unit between
- 00:23
all four of these elements? Ahh well, there we've already given you a hint.
- 00:28
Yeah the number 4 part of it. What else?
- 00:31
X. Okay so there's a 4x common to all of these
- 00:36
and we can factor it out to make life oh so much simpler.
- 00:39
We now have an equation that looks like this: 4x times the quantity xy
- 00:44
plus 4y plus 3x plus 12 we have an equation here
- 00:48
a very common form. We can factor this down to the
- 00:52
quantity X plus 4 times the quantity y plus 3.
- 00:56
Here we go. So boom! The answer is B.
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