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12 November, 10:19

What binomial must be subtracted from 7t-5) so that the difference of the 2 polynomials is (5r+8) ?

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  1. 12 November, 10:26
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    1) Given binomials:

    First binomial 7r - 5

    Second binomial 5r + 8

    2) To pass from 7r to 5r you have to subtract 2r, so the first term of the binomial to be subtracted is 2r

    3) To pass form - 5 to + 8, you have fo subtract - 13

    4) So the answer is 2r - 13, option b.
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