Find what a equals in this equation. x(x+a)(x+3) = x(x+3)(x-3)

Question

Find what a equals in this equation.


`x(x+a)(x+3) = x(x+3)(x-3)`

Answer 1

a = - 3

Explanation:

The equation has common factors x(x + 3) on both sides

For the 2 sides of the equation to be equal, then the factor

(x + a) = (x - 3) and by comparison

a = - 3