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11 April, 19:23

the sum of two trinomials is 7x squared - 5x + 4. If one of the trinomials is 3x squared + 2x - 1, then what is the other trinomial?

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  1. 11 April, 23:10
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    4x^2 - 7x + 5.

    Step-by-step explanation:

    Just subtract:

    7x^2 - 5x + 4 - (3x^2 + 2x - 1) (Note we need the parentheses around the second triniomial).

    = 7x^2 - 5x + 4 - 3x^2 - 2x + 1 Now subtract like terms:

    = 4x^2 - 7x + 5.
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