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If (3x + 2) (2x - 5) = ax2 + kx + n . What is the value of a - n + k ?

Correct answer: A. 5

  • A. 5
  • B. 8
  • C. 9
  • D. 10
  • E. 11

Explanation

Simplify LHS.. (3x+2)(2x−5)=6x2−11x−10=ax2−n+k equate the coefficients... a=6 ; k = -11 and n = -10.. so a−n+k=6−(−10)+(−11)=6+10−11=5

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About Quantitative Reasoning

Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.

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