Question

72
Evaluate the expression
for x = 3.
72
2

Answer 1

Start by plugging in 3 as x. Next square the given values both on the top and bottom. It gives us 49/9-2. 49/7. ( explanation:for the top if we square 7 we get 49. For the bottom if we square 3 we get 9 and there’s also a 2 that we should subtract. We get 7 on the bottom. 49/7. Here we divide 49 by 7 and as a final result we get 7. Hope I was able to help.

Answer 2

`\boxed{\huge {\sf 7}}`

Explanation:

`\sf Evaluate \: \frac{ {7}^(2) }{ {x}^(2) - 3 } \: where \: x = 3 : \\ \sf \implies \frac{ {7}^(2) }{ {3}^(2) - 2 } \\ \\ \sf {3}^(2) = 9 : \\ \sf \implies \frac{ {7}^(2) }{9 - 2} \\ \\ \sf 9 - 2 = 7 : \\ \sf \implies \frac{ {7}^(2) }{7} \\ \\ \sf {7}^(2) = 7 * 7 : \\ \sf \implies \frac{7 * \cancel{7}}{ \cancel{7}} \\ \\ \sf \implies 7`