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4 votes
Solve for x.
8x^2 - 5 = 11

User Xuzhe
by
7.3k points

2 Answers

4 votes
x = 1

8x^2 turns to 16x
Add five on each side of the equation, totaling 16.
16x = 16
x = 1
User Secondubly
by
7.9k points
2 votes

Answer:

x = ±sqrt(2)

Explanation:

8x^2 - 5 = 11

Add 5 to each side

8x^2 - 5+5 = 11+5

8x^2 = 16

Divide each side by 8

8x^2 = 16/8

x^2 = 2

Take the square root of each side

sqrt(x^2) = ±sqrt(2)

x = ±sqrt(2)

User Adnane
by
8.3k points

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