Ononot — Let f: \mathbb{R} \to \mathbb{R} satisfy f(x) + f(x+2) = 2x^

Functionshard

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Let $f: \mathbb{R} \to \mathbb{R}$ satisfy $f(x) + f(x+2) = 2x^2 + 8x + 10$ . Find $f(x)$ if $f(x)$ is a quadratic polynomial of the form $ax^2 + bx + c$ .