What should be added to 2x² + 3x – 5 to get x²  – x + 1?

(a) –x2 – 4x + 6
(b) x2 – 4x + 6
(c) x2 + 4 x – 6
(d) x2 – 4x – 6

Anurag Mishra Professor Asked on 30th June 2016 in Maths.
Add Comment
  • 1 Answer(s)

    Answer: (a) -x² – 4x + 6

    Solution:-  
    Let added be P.

    Then, 2x² + 3x – 5 + P = x²  – x + 1
    P = x² – x +1  – 2x² – 3x + 5
    P = – x² – 4x + 6.

    Then, – x² – 4x + 6  should be added to 2x² + 3x – 5 to get x²  – x + 1.

    Hence, the correct answer is option (a) – x² – 4x + 6.

     

    Anurag Mishra Professor Answered on 1st July 2016.
    Add Comment
  • Your Answer

    By posting your answer, you agree to the privacy policy and terms of service.