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hartnnBest ResponseYou've already chosen the best response.1
81 is the square of which number?
 9 months ago

hartnnBest ResponseYou've already chosen the best response.1
right! so, we have \(x^29^2 =0\) now use \(a^2b^2=(a+b)(ab)\) to factor that!, what u get ?
 9 months ago
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