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# Which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring?

Updated: 4/28/2022

Wiki User

11y ago

Best Answer

Here are two ways to know if a given quadratic equations can be factored (can be solved by factoring).

1. Calculate the Discriminant D = b^2 - 4ac. When D is a perfect square (its square root is a whole number), then the given equation can be factored.

2. Solve the equation by using the new Diagonal Sum method (Amazon e-book 2010). This method directly finds the 2 real roots without having to factor the equation. Solving usually requires fewer than 3 trials. If this method fails to get the answer, then we can conclude that the equation can not be factored, and consequently the quadratic formula must be used.

Wiki User

11y ago
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