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6 January, 22:46

Which of the following quartic functions has x = - 2 and x = - 3 as its only two real zeroes?

a. x^4 - 5x^3 + 7x^2 - 5x + 6

b. x^4 + 5x^3 + 7x^2 + 5x + 6

c. x^4 + 5x^3 + 7x^2 - 5x - 6

d. x^4 - 5x^3 + 7x^2 + 5x - 6

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  1. 6 January, 23:16
    0
    The answer is option b because by substituting the values corresponding to x = - 2 and x = - 3 then the result of the equation is zero. Therefore, it is shown that for this equation both roots of the polynomial are correct.
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