Thread: Surds

NO calculator allowed.

Please include a step-by-step



How can i make the top answer to a surd?

Thanks

Originally Posted by r_maths

NO calculator allowed.

Please include a step-by-step



How can i make the top answer to a surd?

Thanks

sqrt[1200 - 400sqrt(2)]

factor out 400 out of what's under the squareroot, we get:

sqrt[400(3 - sqrt(2))]

now the squareroot of a product = the product of the squareroots, so

= sqrt(400)*sqrt(3 - sqrt(2))
= 20*sqrt(3 - sqrt(2)) ..............the sqrt(400) = 20

thanks

Originally Posted by r_maths

thanks

sure thing

by the way, the "math thing" isn't working at the moment. this site uses LaTex, and the system is currently down