Question

Given 21x³ - 3x² = 0, which values of x will satisfy the equation? ​

Answer 1

7x=1 (or x=1/7)

Explanation:

First, simplify to get

7x3 -x2 = 0

Factor to get this x2 * (7× - 1) = 0

x2 = 0, then x = 0

Answer 2

0 and 1/7

Explanation:

One obvious answer would be 0. And another:

`21x^3 - 3x^2 = 0 \\21x^3 = 3x^2\\7x = 1\\x = (1)/(7)`