Seudónimo Seudónimo

11-01-2019
Mathematics

contestada

what is the solution of the equation x^2 = 64? A) 8, B) 4, C) +8, D) +4

Respuesta :

SkylaPrior SkylaPrior

11-01-2019

X = +8, -8.
A and C both work but they're the same thing

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jimrgrant1 jimrgrant1

11-01-2019

Answer:

x = ± 8

Step-by-step explanation:

given x² = 64 ( take the square root of both sides )

[tex]\sqrt{x^{2} }[/tex] = ± [tex]\sqrt{64}[/tex]

x = ± 8 ← note plus or minus

This is because 8² = 64 and (- 8)² = 64

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