√x19 = (√x18)(√x) = x9√x
Because:
√x18 = x18/2 = x9
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ok lets let x=4. The square root of 4 to the 2nd power + 4= 8. The square root and power of 2 cancel out? Is that what you mean?
No.
The square root of 147, simplified, is: ± 12.1
sqr root of 18 = 3 * square root of 2