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PLS HELP!!!
Solve x^2 – 4 = 5 by graphing the related function.

A) There are two solutions: 3 and –3.


B) There are two solutions: ±1.


C) There is one solution: 1


D) There are no real number solutions.

Respuesta :

nati12354

Answer:

A

Step-by-step explanation:

Because we can rearrange the equation and get:

x²=5+4

x²=9

[tex]x = \sqrt{9} [/tex]

[tex]x = + 3 \: \: or \: \: - 3[/tex]
A) There are two solutions: 3 and -3
Plug in 3 into X, so it will be 3^2=9
9-4= 5, that makes 3 a solution.
Plug in -3 into X, so it will be -3^2=9
9-4=5, that makes -3 a solution.