Question

find all the zeros of the polynomial x cube + 3 x square - 5 x minus 15 if its zeros are root 5 and minus root 5​

Answer 1

$\green\mattfrak{Hey\:there}$

Answer:

x = –3

Step-by-step explanation:

We know that two zeros are √5 and –√5

x = –√5

x² + 5

Now, dividing x³ + 3x² – 5x – 15 by x² + 5

We get reminder as –10x –30

–10x –30 = 0

–10x = 30

x = –3

Kindly refer the attachment for the division process. :)

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Answer 2

Step-by-step explanation:

your answer is in the above attachment