Answers

2016-07-03T11:13:17+08:00
For me, YES, she could possibly use it, because as you simplify the equation, it will become 4 x^{2} =25. Since 4 x^{2} and 25 are perfect squares, they can be  solve through complting the squares and therefore will give you positive and negative  \frac{5}{2} .
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