Question

What are the zeroes of f(x) = x2 − x − 2?

Answer 1

hello :
x²-x-2 = (x+1)(x-2)
x²-x-2 = 0 : x+1 =0 or x-2 = 0
x= -1 or x= 2 are the zero of f(x)

Answer 2

Explanation:

for zero we need to solve the equation f(x)=0

so we get

`x^2-x-2=0`

In the next step we need to factor this quadratic

(x-2)(x+1)=0

using the zero product rule we get

x-2=0 and x+1=0

x=2 and x=-1

so the solution is x= {-1,2}