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Home Q & A Board Science-Related Homework Help Mathematics
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rjacinto rjacinto
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11 years ago
1. Can we use completing the square if the given quadratic equation is factorable?
2. Are all quadratic equation can be solved using factoring? Why?
3. How can we verify if the values of x we obtained are correct or not?
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#1
11 years ago
1. Yes, you can use completing the square, if the quadratic equation is factorable.
2. Not all quadratic equations can be solved using factoring. This is because only those equations, which have integers as roots, can be factored.
3. Put either value of x in the equation, It should satisfy the equation. For example, if the equation is of the type ax^2+bx+c = 0, then putting value of x as either of the two roots i.e. {-b+/- sqrt(b^2-4ac)}/2a, should give value of LHS as zero.
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