1. sqrt 18 = sqrt (9x2) = sqrt (3^2)x 2 = 3 sqrt 2

2. sqrt 12 = sqrt (4x3) = sqrt (2^2)x3 = 2 sqrt 3

3. cubert 40 = cubert (8x5) = cubert (2^3)x5 = 2 cubert 5

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9. quadrt 48 = quadrt (16x3) = quadrt (2^4)x3 = 2 quadrt 3

Please do the remaining questions accordingly.