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//Newtons Method
package main
import (
"fmt"
"math"
)
func Sqrt(x float64) float64 {
var z float64=1
for i:=1;i<=10;i++{
z =(z-(math.Pow(z,2)-x)/(2*z))
}
return z
}
func main() {
fmt.Println(Sqrt(64))
}