donjon04 donjon04

12-06-2016
Mathematics

Answered

Solve the following quadratic equation by the square root property of equality.

x2 - 81 = 0

Verified Answer :

georgiatrn georgiatrn

12-06-2016

x² - 81 = 0
x² = 81
x = √81
x = 9

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jpalomino5 jpalomino5

26-01-2021

Answer:

x=9 x=-9

Step-by-step explanation:

\(x^{2}\)-81=0

+81 +81

\(x^{2}\)=81

\(\sqrt{x^{2} }\)=\(\sqrt{81}\)

x=±9

the person above me was right just didn't finish putting it all in.

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