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Karo-lina-s [1.5K]
3 years ago
12

One of the zeros of the polynomial function is 5.

Mathematics
2 answers:
maks197457 [2]3 years ago
7 0
The last term  is -100 so  its either a or d.
Try a:-

(x^2 - 25)(x-2)(x - 2)

= x^2 - 25 (x^2 - 4x + 4)

= x^2 + 4x^3 + 4x^2 - 25x^2 + 100x - 100
= x^4 + 4x^3 - 21x^2 + 100x - 100   

Its a.

astra-53 [7]3 years ago
7 0

Answer:

The factored form of the function is:

A. f(x) = (x-5)(x+5)(x-2)^{2}

Step-by-step explanation:

To factor the expression you can use synthetic division.

f(x)=x4−4x3−21x2+100x−100

1. Take the constant and find it's factors. So the factors of 100 are:     ±1, ±2, ±4, ±5,±10,±20,±25, ±50,±100

  • In this case -5 works (synthetic division is shown in the picture attached)

<em>        Hint: you know a number divides the polynomial expression      </em>

<em>        when the remainder is zero </em>

2. Therefore: f(x) = (x+5)(x^{3}-9x^{2}+24x-20)

   Using synthetic division once more. The factors of twenty are:

   ±1, ±2, ±4, ±5,±10,±20.

   In this case 2 works (synthetic division is shown in the picture          

   attached)

3. Therefore: f(x)= (x+5)(x-2)(x^{2} -7x+10)

4. Factor the last expression: (x^{2} -7x+10)

  • _ + _ = -7 and _ x _= 10
  • -5 and -2

5. So (x^{2} -7x+10) = (x-5)(x-2)

6. Therefore: f(x) = (x+5)(x-2)(x-5)(x-2) = (x-5)(x+5)(x-2)^{2}

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