Limit Evaluation 587E00
1. We are asked to find the limit: $$\lim_{x \to 2} \frac{x^4 + 3x^3 - 10x^2}{x^2 - 2x}$$.
2. First, check if direct substitution is possible by plugging in $x=2$:
$$\text{Numerator} = 2^4 + 3 \cdot 2^3 - 10 \cdot 2^2 = 16 + 24 - 40 = 0$$
$$\text{Denominator} = 2^2 - 2 \cdot 2 = 4 - 4 = 0$$
Since both numerator and denominator are zero, we have an indeterminate form $\frac{0}{0}$.
3. To resolve this, factor numerator and denominator to simplify the expression.
4. Factor denominator:
$$x^2 - 2x = x(x - 2)$$
5. Factor numerator $x^4 + 3x^3 - 10x^2$:
First, factor out $x^2$:
$$x^2(x^2 + 3x - 10)$$
Now factor the quadratic:
$$x^2(x + 5)(x - 2)$$
6. Substitute factored forms back into the limit expression:
$$\lim_{x \to 2} \frac{x^2 (x + 5)(x - 2)}{x (x - 2)}$$
7. Cancel common factor $(x - 2)$:
$$\lim_{x \to 2} \frac{x^2 (x + 5)}{x} = \lim_{x \to 2} x (x + 5)$$
8. Now substitute $x=2$:
$$2 (2 + 5) = 2 \times 7 = 14$$
Final answer:
$$\boxed{14}$$