Algebra I Help: Special Products _ Square of a Binomial

In this video, we talk about the general formula for squaring a binomial. We can use this formula to get a quick solution when we see a binomial multiplication problem of this nature.

[Greenemath]

Multiplication is commutative and associative. This means that the order / grouping doesn't matter when we multiply. Both of those: 2(xy) and 2xy are the same. I could also write this as x * 2 * y, or y *2 *x. Although conventionally we write the number first, followed by the variable(s). Just remember, if you just have multiplication involved, it's always going to be the same no matter what order or grouping.

[cooljdofficial]

Thank u sir.
Now im perfect in math!!!

[RB-nmko]

I tried to do the last problem in the standard way: so would (r - 1)(r -1) be written as r^2 -1r -1r + 1? Thanks

[Greenemath]

Which part? Give me the section in the video, and I'll try to break it down for you.

[via]

your example is z + 9 is it ok not to put close parenthesis on the z squared, x9 and at the 9squared?

[humphreyfoster]

I enjoy watching your video but I still don't know how to solve this thing 8m squared n cube + 9m cube p cube. Please help me...

[primo]

Hey!... I must say that I really enjoy watching your videos. They have helped me a lot. But I have come across a problem that I cant wrap my head around. So im posting this to see your able to give me a hand with solving this
(x squared -3y squared+2xy). I've tried foiling and also un-foiling. Help plz.

[dudetellaarmy]

This help me a lot! Tom. is my exam on math and I learned a lot. my teacher is not that good enough ( I think )

[barrosc]

so, if you have to multiply x by y before you multiply the answer by 2 wouldnt it be 2(xy) not 2x y?

[sammysparky]

thank you so much! I actually understand it now

[mnbv]

Thank you so much. You explained it so much easier.

[ardellereyes]

Thank you. I enjoyed your video a lot :)

[Endless]

im just 13 years old and can u pls tell me if the answer is correct....
(xy-12)^2 = xy^2 - 24xy + 144

[kraken]

I though the z is no. 2 haha... @ 4:02