Question
If $\mathrm{f}: R \rightarrow R$ and $\mathrm{f}(\mathrm{x})=5 x^{2}-7 x+9$, find $\mathrm{f}(0)$, $\mathrm{f}(1), \mathrm{f}(-2)$ and $f\left(\frac{1}{2}\right) .$
✓
Answer
$\mathrm{f}(0)=9, \mathrm{f}(1)=7, \mathrm{f}(-2)=43, f\left(\frac{1}{2}\right)=\frac{27}{4}$
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