Question #3d46e

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Question #3d46e

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Answer 1 · 2018-01-20T02:45:30

$k = \pm 5$ $k = pm 5$

Explanation:

Well, $k^{2} + 25$ $k^2+25$ is just an expression, and without something on the other side of the equation, it’s impossible to solve for $k$ $k$ .

However, since the “=“ and “+” keys are extremely close together on the keyboard (or just a shift key apart on the computer), I’m assuming you meant $k^{2} = 25$ $k^2 = 25$ . In which case:

Take the square root of both sides. $\sqrt{k^{2}} = k$ $sqrt(k^2)=k$ , just like the $\sqrt{3^{2}} =$ $sqrt(3^2)=$ 3. The square root of the other side, $\sqrt{25}$ $sqrt(25)$ , is $5$ $5$ , so $k = 5$ $k = 5$ .

Here it is worked out:
$k^{2} = 25$ $k^2 = 25$
$\sqrt{k^{2}} = \sqrt{25}$ $sqrt (k^2) = sqrt (25)$
$k = \pm 5$ $k = pm5$

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