Question

Translate to an algebraic expression.

A number is 30 less than its square. Find all such numbers.

Answer 1

Explanation:

Let the number be n. Then: n = n^2 - 30 .

Rewriting this in standard quadratic format, we get:

n^2 - n - 30.

This factors into: (n - 6)(n + 5),

whose solutions are 6 and -5