The correct option is C 9?^2× 8 250=395 ⇒ x^2× 8 =395+250 ⇒ x^2× 8=645 ⇒ x^2=645/8=80.625 ⇒ x^2≈ 81 ⇒ x=9 ...

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Equations

?2× 8-250=395

Question

$?^{2} \times 8 - 250 = 395$

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Solution

The correct option is E 9
$?^{2} \times 8 - 250 = 395 \Rightarrow x^{2} \times 8 = 395 + 250 \Rightarrow x^{2} \times 8 = 645 \Rightarrow x^{2} = \frac{645}{8} = 80.625 \Rightarrow x^{2} \approx 81 \Rightarrow x = 9$

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