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12 August, 21:02

Using the polynomials Q = 3x 2 + 5x - 2, R = 2 - x 2, and S = 2x + 5, perform the indicated operation.

Q - [R + S]

2x2 + 3x - 9

4x2 - 3x + 9

2x2 - 3x + 9

4x2 + 3x - 9

+2
Answers (2)
  1. 12 August, 23:23
    0
    (D) 4x² + 3x - 9

    Step-by-step explanation:

    Q - [R+S] = (3x²+5x - 2) - [ (2 - x²) + (2x+5) ] = (3x²+5x - 2) - [2 - x²+2x+5] =

    (3x²+5x - 2) - [ - x²+2x+7] = 3x²+5x - 2+x² - 2x - 7 = 4x² + 3x - 9
  2. 13 August, 01:00
    0
    D: 4x2+3x-9 is the answer
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