Question

how do i do this?
8√5+3√5-√5

Answer 1

let x = sqrt(5)

8x +3x -1x

Answer 2

The square root of 5 would be like your variable and you would combine like terms.

Answer 3

Since all of the roots are the same you just add and subtract the coefficient. 8+3-1=10. Therefore the answer is: \[10\sqrt{5}\]

Answer 4

10√5

Answer 5

so the root doesnt change?

Answer 6

No it doesn't

Answer 7

no because they're all the same root. It's like adding and subtracting fractions, if it has a common denominator you don't have to do much work.

Answer 8

that makes alot of sense
i hve a placement test for college this is on the practice test i dint knw hw to di now i do thank youuuu guys so much

Answer 9

If you don't know radicals they'll place you in remedial. I had to teach this to my boyfriend he's stuck in MAT0028 -.-

Answer 10

Make sure you know factoring, fractions and basic math too.

Answer 11

loll aaahh nooo lol u cd retake it i think i have it in an hour :/
thank you :)

Answer 12

I think you can retake it as long as its before school starts but you need to take your final scores to an adviser. Good luck :)

Answer 13

thanks alot :) i really need it lol