surds (quick reply needed) (1 Viewer)

[fakedsanity]

√a^3 + 2√a

I know the answer because my teacher told me but I don't know how they got the answer! ><
Please help if you can. Need to know this for tommorow!

And also this:
√x^3 + √x - √4x

The maths textbook doesn't teach you how to do them... And they are like completely unrelated to what the chapter is about, Additions and Subtractions of Surds. Not surds with cube and algebra! ><!

If anyone is reading this, please respond ASAP. I will <3 you forever!

 

[lychnobity]

√a^3 + 2√a

I know the answer because my teacher told me but I don't know how they got the answer! ><
Please help if you can. Need to know this for tommorow!

And also this:
√x^3 + √x - √4x

The maths textbook doesn't teach you how to do them... And they are like completely unrelated to what the chapter is about, Additions and Subtractions of Surds. Not surds with cube and algebra! ><!--

If anyone is reading this, please respond ASAP. I will <3 you forever!

What the hell are we supposed to do with them? Simplify? Factorise?

 

[fakedsanity]

 

[fakedsanity]

What the hell are we supposed to do with them? Simplify? Factorise?

oh sorry could not read your post because something was wrong with my screen ><
And yep, I think it wants me to simplify it.
I know the answer, I just want some one to explain them very clearly! Like every step.
thanks!!!

 

[fakedsanity]

hmm, i think you are right
the answer is (a+2)√a (that is.. if my textbook is right... it was wrong for some questions... like seriously, wtf.)

thank you heaps for taking the time to help me
now i'm going to study ur post

but if someone would kindly pls teach me how to do the 2nd question as well. it would be VERY VERY appreciated

 

[fakedsanity]

oh thanks!!! i love u xcelz
time to study ur posts brb
consider this thread closed

 

[fullonoob]

why does this post look funny o-o
like miniature sized