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Alex73 [517]
3 years ago
11

The expression: Can you explain how to factor out the 1/3 from 2 in detail I am having trouble.

SAT
1 answer:
slava [35]3 years ago
6 0

Answer:

Explanation:

If you multiply (x - k)(x + k), you get x^{2} + k*x - k*x - k^{2} which is equal to x^{2} -k^{2}. Now you can see that  \frac{1}{3} *x^{2}  - 2 must be equal to \frac{1}{3}*(x^{2}  - k^{2}) which is equal to \frac{1}{3}*x^{2}  - \frac{1}{3}*k^{2}. Now we just need to solve 2 = \frac{1}{3}*k^{2}. The final answer is k = +- \sqrt{6}.

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