what are the coefficients in the expression 12x^2+3x^2-8x+10

Question

the ^ with a number next to it means that the number is an exponent 

Answer 1

Coefficients are numbers used to multiply a variable. In the given expression they are:

 

12, 3, and -8

Answer 2

                  12x^2 +3x^2-8x+10

             = 15x^2-8x+10

 

           Lets use the Quadradic Formula where:

    A=15

    B=-8

    C=10

              X=(-b+-(sqrt(b^2-4*a*c))

                   ___________________

                              2*a                                           

 

            X1= (--8+(sqrt -8^2-4*15*10))

                   ________________________

                                    2*15                                              

 

           X1= (8+(sqrt(64-600))

                   ________________

                               30                                         

 

               X1= 8+(23.15i)                     

                     ___________

                          30                                          

 

           x1=   31.15i

                   _______

                        30                                    

 

             X1=1.038i

______________________________________________________

       X2=(--8-(sqrt(-8^2-4*15*10)))

              _______________________

                                2*15                                              

 

      X2=(8-(sqrt(64-600))

            ________________

                    30                                   

 

  X2=8--536 

        _______

 

     X2=8+536

          ________

               30

 

   X2=544

         _____

             30

 

   X2= 18.133                (X1=1.038i, X2=18.133)

 

Hope this helps..