If we read this carefully, what you're asking for is (4 of something) minus (1 of the same thing). The result is 3 of them . . . 3 radical 6.
4 radical 6
4 x2
-4 - 6 - (-10) = 0
positive 6 minus positive 4 = (+6) - (+4)= +2
Either answer is correct, depending on the parentheses that should have been specified. sqrt(6*4) = sqrt(24) sqrt(6)*4 = 4*sqrt(6)
4 - 6 = -2
-4 - 6 = -10
-6 - 4 = -10
6√5 + 2√5 - 7 = 8√5 - 7, which cannot be simplified.
4 minus 5 over 6 is 3 and 1 6
6 - 4 = 2