Question

If √5 and -√5 are two zeroes of the polynomial x3+3x2-5x-15.Find third zero

Answer 1

Answer:

(x+√5) (x-√5) = x²-5

therefore we divide the given polynomial with the given number using long division. i hope you know that since i don't know how to do it through pc

the quotient you get after the long division will be:

                      x - 3=0

therefore the third zero will be 3

so, all zeros from this given polynomial will be √5 ,√5, 3

hope this helps you!!

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