Download the Universal Calculator App for Android Launch the App(mobile only) : Universal Calculator . Solving a Quadratic equation An equation of the format ax 2 +bx+c=0 where a != 0 is called quadratic equation. Example: 3x 2 +5x+6 = 0 Example: x 2 +2=0 Example : 2x 2 +2x=4 Method 1: By factorization. Here we factorize our equation so that it can be written in the format (x+a)(x+b)=0 We can then say that either (x+a)=0 or (x+b)=0 Depending on which one we consider to be equal to zero, we would have two different values for x. Let us try to understand this further by solving equation in example 3. The given equation can be re-written in ax 2 +bx+c=0 format as shown below. =>2x 2 +2x-4=0 =>a = 2, b = 2 & c = -4 Now to factorize this, we use grouping method. In this method we split the co-efficient of x (b) such that their product is equal to the product of co-efficient of x 2 (a) and const...