By getting the LCD first and then divide it
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It depends whether the given quadratic equation can be factored or not.

To if it can be factored, us the discriminant formula: b² - 4ac which is derived from the quadratic formula.

Identify the values of a, b, and c in the general form of the equation:
                     ax² + bx + c =0.

If it can be factored, do these steps:
1)  Multiply the values of a and c:  
2)  Factor the product of a and c
3) Add the product.  The sum should be the value of b.