Question

How do you find the roots for `f (x)= x^2 -4`?

Answer 1

x = ± 2

Explanation:

To find the roots- where f(x) crosses the x-axis. Equate f(x) to zero and solve.

solve : `x^2-4=0rArrx^2=4rArrx=±2`
graph{x^2-4 [-10, 10, -5, 5]}