Question

When adding and subtracting radicals, can you join like terms ignoring the signs

Answer 1

??

Answer 2

what do u mean by signs?

Answer 3

what r radicals? O.o

Answer 4

\[2\sqrt{10}-3\sqrt{40}\]

Answer 5

when adding and subtracting radicals; the radicals act like a variable in that you can only work them out if they are the same...

Answer 6

you have to rewrite sqrt(40) in terms of sqrt(10)s to work this out

Answer 7

sqrt(40) = sqrt(10*4) = sqrt(10) sqrt(4)

sqrt(10) [2 - 3(2)] = -4sqrt(10)

Answer 8

2sqr10-3sqr(4*10)=2sqr10-6sqr10=-4sqr10.....i guess :)