What is the solution of the equation x2 = 64?
+8
8
+4
4
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Answer:
x=±8
Step-by-step explanation:
The square root of a positive number has a negative and positive real root.
Therefore:
x²=64
x=√64
x=±8
Let's check:
(-8)²=-8*-8=64 works
(8)²=8*8=64 works