Question

find all the zeros of the polynomial x cube +5x square-2x-10,if two of its zeros are √2 and-√2​

Answer 1

Answer:

ur solution is in above attachment...

Step-by-step explanation:

hope it may helps u..

Answer 2

Answer:

x = √2, -√2, -5

Step-by-step explanation:

p(x) = x³+5x²-2x-10

Always remember that number of zeroes for a polynomial is always equal to its degree.

Here, degree = 3. So, there will be 3 zeroes to this polynomial.

Factorize x³+5x²-2x-10,

=> x²(x+5)-2(x+5) = (x²-2)(x+5)

=> (x+√2)(x-√2)(x+5)

For, (x+√2)(x-√2)(x+5) = 0

x = √2, -√2, -5