Question

Help with simplifying!

(5−√(10−5x)) * (2+√(10−5x))

Answer 1

OK
do you know this?
\[(a+b)(a-b)=a^2-b^2\]and the middle term cancels

Answer 2

yes

Answer 3

Do you see the same thing in your problem?

Answer 4

=/ the radicals make it confusing for me

Answer 5

\[(5−\sqrt{10-5x}) \times (2+\sqrt{10-5x})\]

Sorry it won't cancel, just expand the parenthesis.

Answer 6

so