The product $(x + 3)(x - 2)(x + 5)$ when $x = 1$ equals

The product $(x + 3)(x - 2)(x + 5)$ when $x = 1$ equals
  1. $24$
  2. $-24$
  3. $-12$
  4. $12$

Solution

Substitute $x = 1$: $(1+3)(1-2)(1+5) = 4 \times (-1) \times 6 = -24$.

Asked in: IMO

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