Question

If f(x)=x^2 - 3 and f(a)=46, what is the value of a? explain

Answer 1

You are trying to find what x to put into f(x) to get out 46. To do this, solve the following equation.
$x^{2} -3 = 46$
$x^2 = 49$
$x^2 = \sqrt{49}$
Therefore x = 7 or x = -7

-7, 7