We’re asked to simplify 5x

squared plus 8x minus 3 plus 2x squared minus 7x plus 13x. So really, all we have to do

is we have to combine like terms– terms that have x raised

to the same power. And the first thing we can do,

we can actually get rid of these parentheses right here,

because we have this whole expression, and then we’re

adding it to this whole expression. The parentheses really don’t

change our order of operations here. So let me just rewrite it once

without the parentheses. So we have 5x squared plus 8x

minus 3 plus 2x squared. If this was a minus then we’d

have to distribute the negative sign, but it’s not. So plus 2x squared minus

7x plus 13x. Now let’s just look at the

different terms that have different degrees of x. Let’s start with the x squared

terms. So you have a 5x squared term here and you have a

2x squared term right there. So 5 of something plus 2 of that

same something is going to be 7 of that something. So that’s going to

be 7x squared. And then let’s look at

the x terms here. So we have an 8x right there. We have a minus 7x. And then we have a plus 13x. So if you have 8 of something

minus 7 of something, you’re just going to have 1

of that something. And then if you add 14 of

that something more, you’re going to 15. So this is going

to be plus 15x. 8x minus 7x– oh, sorry. You’re going to have 14x. 8 minus 7 is 1 plus 13 is 14. Plus 14x. That’s these three terms.

8x minus 7x plus 13x. And then finally, you have a

negative 3– or minus 3, depending on how you

want to view it. And that’s the only

constant term. You could say it’s x

times x to the 0. But it’s a constant term. It’s not be multiplied by x. And that’s the only one

there, so minus 3. And we’ve simplified it

as far as we can go. We are done.

can you be my teacher?? forever?? please

word.

got a score 44/50 on my quiz because of this! Thanks Sal!

I got a 99 on my Math Exam bc of this!! Thanks!

Thanks Sal Your The BOMMB yeah 🙂 hehehehe pickles

@italianstallion929 Good Job random person

@godzilla8345 okay then lul

@prettiecake lul its the new lol yeah 😉

Thank you!! This really helped me a lot because I was absent from school the day we learned this.

He already is 🙂 u can view his vids at any time

Omg Your awesome. But what did you do to the 13x? I'm confused

tylers gay

THANKS THAT HELPED!!

Thank you so much!

I have been struggling in school because I couldn't understand what I had to do but after I had watched this video it all made sense!

Thank you so much, Its really help in my assignment!

Thanks for refreshing my mind. I came to class late and had no idea what the teacher was lecturing about. She talks pretty fast. Simple stuff.

thanks. I needed to refresh my skills. also do you notice there's so many views but so few comments?

thx khan academy

thanks, it really helps my final exam! and it is easy to understand

if only my algebra2/trig teacher was good at explaining as you and i go to a private school for gods sake XD

Thank you so much

omg it really helps me! and oh gosh my heart is pumping hard, the our exam will be like forever!

Dude these vids help me Soo much my teacher sucks so these are a lifesaver

Thank yiu

Oh my gosh thank you! My algebra 1 teacher talks too fast, and this method is even more easy than she taught me!

Wow, So you just combine like terms! 😐

"This something" and "that something" helped me so much lolz

How do i know which sign to put?

Yoo this is so helpful. But when he said oh sorry its 14x am not sure cuz it is 15x

8+7=15 Boiiiiiiii😂😂😂😂😂😂😂😂