若(x-1)的二次方=4,那麼x的立方為()

若(x-1)的二次方=4,那麼x的立方為()

若(x-1)的二次方=4,那麼x的立方為(27或-1)
(x-1)^2=4
x-1=2或x-1=-2
x1=3 x2=-1