We are given the function $f(x) = x^2 - 3x + 4$. We want to find the values of $x$ such that $f(x) = f(2x+1)$.

AlgebraQuadratic EquationsFunctionsEquation SolvingAlgebraic Manipulation
2025/5/6

1. Problem Description

We are given the function f(x)=x23x+4f(x) = x^2 - 3x + 4. We want to find the values of xx such that f(x)=f(2x+1)f(x) = f(2x+1).

2. Solution Steps

We are given f(x)=x23x+4f(x) = x^2 - 3x + 4.
We need to find the values of xx that satisfy the equation f(x)=f(2x+1)f(x) = f(2x+1).
Substituting the expression for f(x)f(x) into the equation, we have:
x23x+4=(2x+1)23(2x+1)+4x^2 - 3x + 4 = (2x+1)^2 - 3(2x+1) + 4
Expanding the terms, we get:
x23x+4=(4x2+4x+1)(6x+3)+4x^2 - 3x + 4 = (4x^2 + 4x + 1) - (6x + 3) + 4
x23x+4=4x2+4x+16x3+4x^2 - 3x + 4 = 4x^2 + 4x + 1 - 6x - 3 + 4
x23x+4=4x22x+2x^2 - 3x + 4 = 4x^2 - 2x + 2
Now, we rearrange the equation to set it equal to zero:
0=4x2x22x+3x+240 = 4x^2 - x^2 - 2x + 3x + 2 - 4
0=3x2+x20 = 3x^2 + x - 2
We can factor this quadratic equation:
3x2+x2=03x^2 + x - 2 = 0
3x2+3x2x2=03x^2 + 3x - 2x - 2 = 0
3x(x+1)2(x+1)=03x(x+1) - 2(x+1) = 0
(3x2)(x+1)=0(3x - 2)(x + 1) = 0
Therefore, either 3x2=03x - 2 = 0 or x+1=0x + 1 = 0.
If 3x2=03x - 2 = 0, then 3x=23x = 2, so x=23x = \frac{2}{3}.
If x+1=0x + 1 = 0, then x=1x = -1.
Thus, the values of xx that satisfy the equation are x=23x = \frac{2}{3} and x=1x = -1.

3. Final Answer

The values of xx that satisfy the equation f(x)=f(2x+1)f(x) = f(2x+1) are x=23x = \frac{2}{3} and x=1x = -1.

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