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4 years ago

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

Mathematics

2 answers:

Mrrafil [7]4 years ago

7 0

X = 1

8x^2 turns to 16x
Add five on each side of the equation, totaling 16.
16x = 16
x = 1

GenaCL600 [577]4 years ago

5 0

Answer:

x = ±sqrt(2)

Step-by-step 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)

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