SOLUTION: Sqrt(-5)sqrt(-20)

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Question 212845: Sqrt(-5)sqrt(-20)
Found 3 solutions by Alan3354, checkley77, MathTherapy:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Sqrt(-5)sqrt(-20)
= sqrt(100)
= ±10

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
Sqrt(-5)sqrt(-20)
sqrt(-5*-20)
sqrt100=10 ans.

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!
Sqrt(-5)sqrt(-20)
sqrt%28-5%29%2Asqrt%28-20%29 ----> sqrt%28-1%2A5%29%2Asqrt%28-1%2A4%2A5%29 ----> i%2Asqrt%285%29%2Ai%2Asqrt%284%29%2Asqrt%285%29 ----> 2i%5E2%2Asqrt%285%29%2Asqrt%285%29 ----> 2%28-1%29%2A5 = highlight_green%28-10%29

-------------------------------- OR ------------------------------------------

sqrt%28-5%29%2Asqrt%28-20%29 ----> sqrt%28-5%2A-20%29 ----> sqrt%28-1%2A5%2A-1%2A4%2A5%29 ----> sqrt%28-1%29%2Asqrt%28-1%29%2Asqrt%284%29%2Asqrt%285%29%2Asqrt%285%29 -----> i%2Ai%2Asqrt%284%29%2Asqrt%2825%29 ----> i%5E2%2A2%2A5 = -1%2A2%2A5 = highlight_green%28-10%29