Math, asked by savtri40, 7 months ago

x^2-20x+120 factorise​

Answers

Answered by anjalibalajee2009
1

Answer:

x^2-20x-120=0

Factoring  x2-20x-120

The first term is,  x2  its coefficient is  1 .

The middle term is,  -20x  its coefficient is  -20 .

The last term, "the constant", is  -120

Step-1 : Multiply the coefficient of the first term by the constant   1 • -120 = -120

Step-2 : Find two factors of  -120  whose sum equals the coefficient of the middle term, which is   -20 .

     -120    +    1    =    -119

     -60    +    2    =    -58

     -40    +    3    =    -37

     -30    +    4    =    -26

     -24    +    5    =    -19

     -20    +    6    =    -14

     -15    +    8    =    -7

     -12    +    10    =    -2

     -10    +    12    =    2

     -8    +    15    =    7

     -6    +    20    =    14

     -5    +    24    =    19

     -4    +    30    =    26

     -3    +    40    =    37

     -2    +    60    =    58

     -1    +    120    =    119

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored

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