77,619 views
24 votes
24 votes
8x^2-7=793 solve by taking square roots

User Travis White
by
2.8k points

2 Answers

18 votes
18 votes

Answer:


{8x}^(2) - 7 = 793 \\ {8x}^(2) = 793 + 7 \\ {8x}^(2) = 800 \\ {x}^(2) = 100 \\ x = 10

User Ronnix
by
3.6k points
17 votes
17 votes

Answer:

x = ± 10

Explanation:

8x² - 7 = 793 ( add 7 to both sides )

8x² = 800 ( divide both sides by 8 )

x² = 100 ( take square root of both sides )

x = ±
√(100) = ± 10

User Victor Axelsson
by
2.2k points
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