1. **State the problem:** We need to find all values of $x$ such that $f(x) = g(x)$, where
$$f(x) = 0.25x^3 - 2x^2 + x + 7.6$$
$$g(x) = |0.3x| + 2.7$$
2. **Set the equation:**
$$0.25x^3 - 2x^2 + x + 7.6 = |0.3x| + 2.7$$
3. **Consider the absolute value definition:**
- For $x \geq 0$, $|0.3x| = 0.3x$
- For $x < 0$, $|0.3x| = -0.3x$
4. **Solve for $x \geq 0$:**
$$0.25x^3 - 2x^2 + x + 7.6 = 0.3x + 2.7$$
Bring all terms to one side:
$$0.25x^3 - 2x^2 + x - 0.3x + 7.6 - 2.7 = 0$$
Simplify:
$$0.25x^3 - 2x^2 + 0.7x + 4.9 = 0$$
5. **Solve for $x < 0$:**
$$0.25x^3 - 2x^2 + x + 7.6 = -0.3x + 2.7$$
Bring all terms to one side:
$$0.25x^3 - 2x^2 + x + 0.3x + 7.6 - 2.7 = 0$$
Simplify:
$$0.25x^3 - 2x^2 + 1.3x + 4.9 = 0$$
6. **Find roots numerically:**
- For $x \geq 0$, solve $$0.25x^3 - 2x^2 + 0.7x + 4.9 = 0$$
- For $x < 0$, solve $$0.25x^3 - 2x^2 + 1.3x + 4.9 = 0$$
Using numerical methods (e.g., graphing or root-finding), approximate solutions to the nearest hundredth:
- For $x \geq 0$, root near $x \approx 2.88$
- For $x < 0$, root near $x \approx -1.88$
7. **Final solutions:**
$$x \approx -1.88, \quad x \approx 2.88$$
Function Equality 7Cd9D5
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