( \frac x %2B 1 x %2B 2 ) ^ 2 = \frac x %2B 2 x %2B – InterviewSolution

1.

( \frac x %2B 1 x %2B 2 ) ^ 2 = \frac x %2B 2 x %2B 4

Answer»

(x + 1)^2 (x + 4) = (x + 2)^3

(x^2 + 2x + 1)(x + 4) = x^3 + 8 + 6x^2 + 12x

x^3 + 2x^2 + x + 4x^2 + 8x + 4= x^3 + 8 + 6x^2 + 12x

9x + 4 = 12x + 812x - 9x = 4 - 83x = - 4x = - 4/3

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