Math
posted by Cyn .
(√ 10 +3)(√ 10  3)
When I multiply the √ 10's what would it come out to be? That's what throws me off >_<

( a + b ) ( a  b ) = a ^ 2  b ^ 2
[ sqrt ( 10 ) + 3 ] [ sqrt ( 10 )  3 ] =
sqrt ( 10 ) ^ 2  3 ^ 2 =
10  9 = 1
If your expression mean :
sqrt [ ( 10 ) + 3 ] sqrt [ ( 10 )  3 ]
then
sqrt [ ( 10 ) + 3 ] sqrt [ ( 10 )  3 ] =
sqrt ( 13 ) sqrt ( 7 ) =
sqrt ( 13 * 7 ) = sqrt ( 91 )