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27 October, 05:54

What polynomial should be added to 4x²+5x-8 in order to equal 0?

A. 4x+5x+8

b. - 4x²-5x+8

c. - 4x²-5x-8

d. - 4x²

e. 4x²+5x-8

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Answers (1)
  1. 27 October, 06:34
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    4x^2 + 5x - 8 + ( - 4x^2 - 5x + 8) = 0

    all ur doing is changing the signs so they will cancel each other out.

    so ur adding : - 4x^2 - 5x + 8
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