Question

Solve x2 – 4 = 5 by graphing the related function.

Answer 1

x2-4=5
+4 +4
x2=9
square root both the x and 9
x=3

Answer 2

Refer graph attached below

Explanation:

Given equation
`x^2-4=5`

We have to Solve the given equation
`x^2-4=5` graphically.

We first solve the given equation
`x^2-4=5`

Consider the given equation
`x^2-4=5`

Adding 4 both sides, we have

`\Rightarrow x^2-4+4=5+4`

Simplify, we get,

`\Rightarrow x^2=9`

`\Rightarrow x^2-9=0`

To plot the graph let
`x^2-9=y` be the equation

It will be a parabola with vertex (0,9).

Refer graph attached below