Answers

2015-07-21T04:20:40+08:00
You can still solve it through the four ways. But some of them is still needed to make the equation in standard form. But in other cases, for instance, (x-1)(x+2)=0, you can immediately equate it to zero and get the roots (alpha and beta). Other cases like (x-1)^2=9, you can immediately get the squares,for I instance, x-1= [+-]3 ==> x=4 or - 2.

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