So $ f(5) = 5^2 + 2\cdot5 = 25 + 10 = 35 $.

Wed, 06 May 2026 11:30:19 +0000

Understanding the Simple Mathematical Expression f(5) = 5² + 2·5 and Why It Matters (So $ = 35) When first encountering the expression f(5) = 5² + 2·5, it may seem like a basic algebraic computation—but setting the stage for this simple equation reveals a deeper appreciation for how mathematics facilitates problem-solving and logical reasoning. At its core, evaluating f(5) translates to substituting x = 5 into the function defined as f(x) = 5² + 2·5. Breaking this down step-by-step: - The exponent term: 5² means 5 squared, which equals 25.
- The multiplication term: 2·5 equals 10.