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What is the constant term in ( (x-2)(x+11) )?

Answer and explanation

Correct answer: (-22)

The direct answer is B: the constant term is −22. A constant term is the part with no variable, so in (x−2)(x+11) it is obtained by multiplying the two constant numbers, −2 and 11. Step by step, expand: x·x=x², x·11=11x, (−2)·x=−2x, and (−2)·11=−22. Combining the middle terms gives x²+9x−22; therefore the term without x is −22. Option A, 22, has the wrong sign because a negative number multiplied by a positive number is negative. Option B is correct because (−2)×11=−22. Option C, 9, is the coefficient of x after combining 11x and −2x, not the constant term. Option D, −9, is not produced by the expansion and confuses the middle-term calculation with the constant calculation. Exam cue: in a product of two linear expressions, multiply the constants to find the constant term, while checking their signs carefully. Decision: pass; B is mathematically correct.

Related tags

Constant TermSigned ProductAlgebra

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