The square root of minus 8 is equal to the square root of 8 times the square root of minus 1, or 2.8284i.
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Expressed in root form, 5 sqrt(18) - 7 sqrt(8) = sqrt(2)
square root of 8
9 square root 4 minus 12 square root 4 = -6
Rounded to two decimal places, 8 sqrt(5) - 5 sqrt(54) = 18.85
Square root (24) - square root (6) = 2.44948974