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If (p(x)=(s-2)x^3+(s+1)x^2+5) is a non-zero constant polynomial, what is possible?

Answer and explanation

Correct answer: No such (s) exists

The direct answer is C, no such value of s exists. A non-zero constant polynomial must have no variable terms, while its constant term must remain non-zero. Here the coefficients of both variable terms must be zero: s−2=0 gives s=2, whereas s+1=0 gives s=−1. One number cannot be both 2 and −1, so the two required conditions cannot hold together. The remaining term is 5, which is non-zero, so the issue is only the incompatible coefficients. Option A, s=2, removes the cubic term but leaves (3)x². Option B, s=−1, removes the x² term but leaves (−3)x³. Option C is correct because no single s removes both terms. Option D, s=0, leaves both variable terms. Memory cue: for a constant polynomial, every variable-term coefficient must be zero.

Related tags

Definition-PolynomialConstant-PolynomialParameter

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