Question

Find all zeroes of the polynomial f(x)=x³+3x²-2x-6 if two zeroes are √2 and -√2.

Answer 1

Answer:

-3

Step-by-step explanation:

The polynomial has three roots

hence sum of roots or zeros = -b/a = -3

sum of roots = (root2)+(- root2) + x = -3

Hence another zero is -3