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Question Number 19294 by mondodotto@gmail.com last updated on 08/Aug/17

Answered by mrW1 last updated on 08/Aug/17

$$\mathrm{f}\left(\mathrm{x}\right)={2\mathrm{x}}^2+5\mathrm{x}+3$$$$=2({\mathrm{x}}^2+2\times \frac{5}{4}\mathrm{x}+\frac{25}{16})+3-\frac{25}{8}$$$$=2{(\mathrm{x}+\frac{5}{4})}^2-\frac{1}{8}$$

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