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Solve for x in 8x-2 2 25 - JAMB Mathematics 2024 Question

Solve for x in 8x-2 = 2/25

A
4
B
6
C
8
D
10
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Correct Option: D

We are given the equation \(8x^{-2} = \frac{2}{25}\). First, rewrite the equation as \(8/x^2 = 2/25\), then cross-multiply to get:

\(8 \times 25 = 2 \times x^2\), or \(200 = 2x^2\).

Divide both sides by 2: \(100 = x^2\), and taking the square root of both sides gives \(x = 10\).

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