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Solve x2 − 20 = 0. If necessary, round to the nearest hundredth.
±4.47
400
±40
There is no solution as you cannot take the square root of a negative number.

Respuesta :

igoroleshko156

Answer:

Option A, [tex]x =[/tex] ± [tex]4.47[/tex]

Step-by-step explanation:

Step 1:  Add 20 to both sides

[tex]x^2 - 20 = 0[/tex]

[tex]x^2 - 20 + 20 = 0 + 20[/tex]

[tex]x^2 = 20[/tex]

Step 2:  Square root both sides

[tex]\sqrt{x^2} = \sqrt{20}[/tex]

[tex]x =[/tex] ± [tex]4.47[/tex]

Answer:  Option A, [tex]x =[/tex] ± [tex]4.47[/tex]