Question

factorise 2x square - 2x - 11 / 2​

Answer 1

Step-by-step explanation:

Solving    2x2-2x-11 = 0 by the Quadratic Formula .

 According to the Quadratic Formula,  x  , the solution for   Ax2+Bx+C  = 0  , where  A, B  and  C  are numbers, often called coefficients, is given by :

                                     

            - B  ±  √ B2-4AC

  x =   ————————

                      2A 

  In our case,  A   =     2

                      B   =    -2

                      C   =  -11 /2

Accordingly,  B2  -  4AC   =

                     4 - (-88/2) =

                     48

Applying the quadratic formula :

               2 ± √ 48

   x  =    —————

                    4