irvincastro1246 irvincastro1246
  • 17-06-2020
  • Mathematics
contestada

My question is a complex numbers question: square root -6 times square root -24 the answer is -12, but I don't know how to solve it

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wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 17-06-2020

Answer:

see below

Step-by-step explanation:

sqrt( -6) * sqrt(-24)

We know that sqrt(a b) = sqrt(a) sqrt(b)

sqrt(6) sqrt(-1)  * sqrt(24) sqrt(-1)

We know that sqrt(-1) = i

sqrt(6) i  * sqrt(24) i

We know that sqrt(a) sqrt(b) = sqrt(ab)

sqrt(6*24) i*i

sqrt(144) i^2

12 i^2

We know that i^2 = -1

12 (-1)

-12

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