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.
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4 radical 6
No, you cannot add or subtract under the radical. The radical represents the square root function, and it only operates on the number or expression that is inside the radical. To add or subtract, you need to simplify the expressions inside the radical first.
Either answer is correct, depending on the parentheses that should have been specified. sqrt(6*4) = sqrt(24) sqrt(6)*4 = 4*sqrt(6)
-1,-2,+2,-4,+4,-5,+5, +0. the sequence is subtract twice, add once, subtract again, add, then subtract, then add twice.
-2