ash2155 ash2155

04-02-2021
Mathematics

contestada

Please help, due tomorrow. will give brainlist

given f(x)=x^3-4x+k, and the remainder when f(x) is divided by x-5 is 91, then what is the value of k?

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ChoiSungHyun ChoiSungHyun

04-02-2021

Step-by-step explanation:

By Remainder Theorem, f(5) = 91.

=> (5)³ - 4(5) + k = 91

=> 125 - 20 + k = 91

=> 105 + k = 91

=> k = -14.

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