Question

The cube of a number X is nine times of X the value of X (where X is not equal to 0 and X is not equal to -3) is​

Answer 1

Answer:

x^3=9x

x^3-9x=0

x(x^2-9)=0

x^2-9=0 since x is not equal to zero

(x-3)(x+3)=0

x-3=0 since x is not equal to -3

x=3