Factoring Trinomials || Algebra 1

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Hey Everyone! In this video, we'll be going through how to factor trinomials. We'll first talk about what to do if the x^2 is by itself, and then we'll get into what to do when the x^2 is NOT by itself. That's where factoring by grouping comes in.

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Timestamps:
0:00 - Overview
0:45 - Problem 1
3:41 - Problem 2
4:47 - Problem 3
7:11 - Problem 4
12:01 - Problem 5
16:20 - Answer in Comments
16:35 - Outro

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Like this comment if you want the extended video for factoring trinomials!!!

I’m trying to balance making these extended videos with making new YouTube videos and that balance all depends on the demand for the extended videos.

LudusYT

You deserve much more positivity, these videos are astonishing!

lauritsnielsen

I was looking for something to teach my child about Math then I found your channel. Your videos are awesome, New subscriber here in the Philippines

charliegabriel

the answer for the last problem is (10x-1)(x+9)

guilhermemedeiros

You do an incredible job, thank you!!

freesatire

this playlist is awesome! i figured out on thursday i have to take a test on monday on algebra 1(which i haven’t taken in 2 years). if i don’t pass the test i can’t graduate. so i’m so thankful i found this maybe now i’ll pass lol

rileyblount

Thank u very much, this was so helpful!

shewitsurafel

Last problem solved:
10x2+89x-9 .... -1 + 90 are the numbers that both added make 89, and multiplied make -90, so that gives us..
10x2 +1x | +90x -9
10x (x-1) | -90x - 9 [because I saw at 15:34 you decided to factor out a negative 2 instead of positive 2, I thought I can do the same]
(10x-1) (-10x-1)
Answer: (10x-1)(x+9) [because two negatives make a positive]
Nothing makes me feel more like an idiot than trying to make logic from math equations, pls let me know if this makes any sense, thank you.

cquickk

Better method:
Ax² + Bx + C = 0

Mid: B/A * -½

U² = Mid² - C/A
U = √(Mid² - C/A)

x1 = Mid - U
x2 = Mid + U

Kame

Would it be possible for you to make a video on why the factoring by grouping process works the way it does (in a way that makes sense)? Everyone tells you to use it as an as a means to get factors -- but they don't explain the mathematical logic behind it. Thanks.

chocolateangel