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

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Answer 1 · 2016-05-30T13:12:13

x = ± 2

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]}

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