Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (((0-(6•(x2)))+4)+13x2)-5x
 Step  2  :

Equation at the end of step  2  :

  (((0 -  (2•3x2)) +  4) +  13x2) -  5x

Step  3  :

Trying to factor by splitting the middle term

 3.1     Factoring  7x²-5x+4 

The first term is,  7x²  its coefficient is  7 .
The middle term is,  -5x  its coefficient is  -5 .
The last term, "the constant", is  +4 

Step-1 : Multiply the coefficient of the first term by the constant   7 • 4 = 28 

Step-2 : Find two factors of  28  whose sum equals the coefficient of the middle term, which is   -5 .

Observation : No two such factors can be found !!
Conclusion : Trinomial can not be factored

Final result :

  7x2 - 5x + 4