Question

multiply (2sqrt5-4sqrt6)(5sqrt5+10sqrt6)

Answer 1

\[(2\sqrt{5}-4\sqrt{6})(5\sqrt{5}+10\sqrt{6})\]

Answer 2

Multiply\[ (2\sqrt{5}-4\sqrt{6})(5\sqrt{5}+10\sqrt{6}\] IS that it

Answer 3

\[\sqrt{a} \times \sqrt{a} = a\]
\[\sqrt{a} \times \sqrt{b} = \sqrt{a \times b}\]

Answer 4

yes thats the problem. when i multiply do i multiply the radicals? or do i add somewhere?

Answer 5

\[2\sqrt{5} \times 5\sqrt{5}\]
multiply the radicals, multiply constants, put together constants/radicals:
\[2\times 5 \sqrt{5\times5}\]

Answer 6

which equals 10*5, or 50

Answer 7

see im not for sure how to do it, would using the FOIL method work or no?

Answer 8

(2sqrt5-4sqrt6)(5sqrt5+10sqrt6)
= 2 (sqrt5 - 2sqrt6 ) * 5 (sqrt5+ 2sqrt6)
= 10 (sqrt5)^2 - ( 2sqrt6)^2
= 10 ( 5 - 4 * 6)
= 10 * 19 = 190