Question

write the degree of the polynomial p into x is equal to 3 x square - x to the power 7 plus x to the power 6 into x

Answer 1

We put the numbers that are factors of 4 into the equation to see if any of them are correct.

    f(1) = 13 − 3×12 – 2×1 + 4 = 0                        1 is a solution

    f(−1) = (−1)3 − 3×(−1)2 – 2×(−1) + 4 = 2     

    f(2) = 23 − 3×22 – 2×2 + 4 = −4

    f(−2) = (−2)3 − 3×(−2)2 – 2×(−2) + 4 = −12

    f(4) = 43 − 3×42 – 2×4 + 4 = 12

    f(−4) = (−4)3 − 3×(−4)2 – 2×(−4) + 4 = −100