Multiply Three Binomials
1. Stating the problem: We want to simplify the product $ (5 - x)(6 - 5x)(2 - x) $.
2. First, multiply the first two binomials:
$$ (5 - x)(6 - 5x) = 5 \cdot 6 + 5 \cdot (-5x) - x \cdot 6 - x \cdot (-5x) = 30 - 25x - 6x + 5x^2 = 30 - 31x + 5x^2. $$
3. Now multiply the result by the third binomial $(2 - x)$:
$$ (30 - 31x + 5x^2)(2 - x). $$
4. Distribute each term:
$$ 30 \cdot 2 - 30 \cdot x - 31x \cdot 2 + 31x \cdot x + 5x^2 \cdot 2 - 5x^2 \cdot x $$
which simplifies to
$$ 60 - 30x - 62x + 31x^2 + 10x^2 - 5x^3. $$
5. Combine like terms:
$$ 60 - 92x + 41x^2 - 5x^3. $$
6. Therefore, the simplified expression is:
$$ \boxed{ -5x^3 + 41x^2 - 92x + 60 }. $$