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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