Question

81x^2-5=20
solve by taking the square root ​

Answer 1

Answer:

x = 5/9

Step-by-step explanation:

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Answer 2

$\sf 81 {x}^{2} = 20 + 5 = 25$

$\sf {x}^{2} = \frac{25}{81} \: \: \implies \: \: x = \sqrt{ \frac{25}{81} } = \frac{5}{9}$

$\sf ⟹ value \: \: of \: \: \: x = \frac{5}{9}$

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