Question
परवलय ${x^2} + 4x + 2y - 7 = 0$ का शीर्ष है
${(x + 2)^2} = - 2\left( {y - \frac{{11}}{2}} \right)$
अत: शीर्ष $\left( { - 2,\frac{{11}}{2}} \right)$ है।
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