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If x is real, then the values of the expression $\frac{x^{2} + 14 x + 9}{x^{2} + 2 x + 3}$ are

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4,5

-4,5

-5,4

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Correct option is C

x2+14x+9x2+2x+3=yor x2+14x+9=x2y+2xy+3yor x2y-1+2xy-7+3y-9=0since x is real, we have 4y-72-43y-9y-1≥0or 4y2+49-14y-43y2+9-12y≥0or y+5y-4≤0∴ y∈-5,4

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If x is real, then the values of the expression x2+14x+9x2+2x+3 are

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If x is real, then the values of the expression $\frac{x^{2} + 14 x + 9}{x^{2} + 2 x + 3}$ are