Question

Maths Algebra middle term factorisation with roots

Answer 1

plz post question properly

Answer 2

Answer:

perhaps it is the quadratic expression factorization problem.

       a x² + b x + c 

 Find factors of  product  a * c..    in such a way that their sum is - b

           x² - 5 x  + 4

  factors or  1 * 4 =  1, 2, 4.            choose  1 and 4

  split the middle term as  - 4 x and  - x

          X² - 4 x - x + 4

            X (X - 4)  - 1 (X - 4)

                  (X-1) (X-4)

      ==========================

            2 x² +  x - 10

    factors of  2 * -10 are  1, 2, 3, 4, 5, 10, 20, -1, -2, -4, -5, -10, -20

                    If u add -4 and 5 you get +1.

          2 x² - 4 x + 5 x - 10

          2 x ( x -2)  + 5 ( x - 2)          =>    (2 x + 5 ) ( x - 2 )

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