SOLUTION: cam amybody help me wtih how to do this: x to the second power = -64 x to the second power + 48= 0

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Question 181703: cam amybody help me wtih how to do this:
x to the second power = -64
x to the second power + 48= 0
Found 2 solutions by Mathtut, stanbon:
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
x to the second power = -64
x to the second power + 48= 0
:
x%5E2=-64
:
x=+-sqrt%28-64%29
:
x=+-sqrt%28-1%2A64%29
:
x=+-8i
:
+- is plus or minus
:
follow the same method with
:
x%5E2=-48

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
cam amybody help me wtih how to do this:
x^2 = -64
x^2+64 = 0
(x-8i)(x=8i) = 0
x = 8i or x = -8i
-----------------------------------
x^2 + 48= 0
(x+sqrt(48)i)(x-sqrt(48)i) = 0
x = -sqrt(48)i or x = sqrt(48)i
x = -4sqrt(3)i or x = 4sqrt(3)i
==================================
Cheers,
Stan H.