SOLUTION: simplify \sqrt{-24} * \sqrt{-6}}

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Question 1023671: simplify
\sqrt{-24} * \sqrt{-6}}

Found 2 solutions by addingup, MathTherapy:
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
you have listed two denominators with no numerator:
(??\sqrt{-24}) * (??\sqrt{-6}}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Or perhaps you meant to write the equation like this?
sqrt(-24)sqrt(-6)
If this is the case:
sqrt(-6) = sqrt(-1)sqrt(6) = isqrt(6) Note: -1 is the square root of the number i, and isqrt(6) is because to get the square root of a negative number you have to use i:
sqrt(-24)isqrt(6)
sqrt(-24) = sqrt(-1)sqrt(24) = isqrt(24):
isqrt(24)isqrt(6)
sqrt(24) = sqrt(2^3×3) = 2sqrt(2)sqrt(3):
i×2sqrt(2)sqrt(3)isqrt(6)
sqrt(2)sqrt(3) = sqrt(2×3):
i×2sqrt(2×3)isqrt(6)
2×3 = 6:
i×2sqrt(6 )isqrt(6)
i×2sqrt(6)isqrt(6) = i^2×2×6:
i^2×2×6
i^2 = -1:
-1×2×6
-2×6 = -12 This is your answer:
sqrt(-24)sqrt(-6) = -12

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

simplify
\sqrt{-24} * \sqrt{-6}}
sqrt%28-+24%29+%2A+sqrt%28-+6%29++
sqrt%28-+1+%2A+4+%2A+6%29+%2A+sqrt%28-+1+%2A+6%29
2i+%2A+sqrt%286%29+%2A+i+%2A+sqrt%286%29
2i%5E2+%2A+sqrt%2836%29 = 2(- 1) * 6 = highlight_green%28-+12%29