Question

if two zeroes of polynomial x^3+x^2-5x-5 are√5 and -√5 then it's third zero is

Answer 1

Answer:

-1

Step-by-step explanation:

• x^3+x^2-5x-5=0
• X^3-5x+x^2-5=0
• (x^2-5)(x+1)=0
• (x+√5)(x-√5)(x+1)=0
• x= -√5, x=√5, x= -1