Question

consider the expression x^2-b. What has to be true about the values of b for this expression to be factorable?

Answer 1

b must be greater than zero.

Explanation:

If "b" is negative then our equation will not have real solutions. The expression x^2-b can be factorable only if b>0, and the factorized form will be: (x+b)(x-b)=0