Question

solve by splitting the middle term x^2 +7x-128=0 plz solve fast it's very urgent...​

Answer 1

Answer:

No two such factors can be found !!

Step-by-step explanation:

The first term is,  x2  its coefficient is  1 .

The middle term is,  -7x  its coefficient is  -7 .

The last term, "the constant", is  +128  

Step-1 : Multiply the coefficient of the first term by the constant   1 • 128 = 128  

Step-2 : Find two factors of  128  whose sum equals the coefficient of the middle term, which is   -7 .

     -128    +    -1    =    -129  

     -64    +    -2    =    -66  

     -32    +    -4    =    -36  

     -16    +    -8    =    -24  

     -8    +    -16    =    -24  

     -4    +    -32    =    -36  

     -2    +    -64    =    -66  

     -1    +    -128    =    -129  

     1    +    128    =    129  

     2    +    64    =    66  

     4    +    32    =    36  

     8    +    16    =    24  

     16    +    8    =    24  

     32    +    4    =    36  

     64    +    2    =    66  

     128    +    1    =    129  

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored