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Rasek [7]
4 years ago
5

X2 – 12x + 27 = 0 Solutions: x = and x =

Mathematics
2 answers:
jolli1 [7]4 years ago
6 0

Answer:

Step-by-step explanation:  x = 9  

x = 3  

Step by step solution :

Step  1  :

Trying to factor by splitting the middle term

1.1     Factoring  x2-12x+27  

The first term is,  x2  its coefficient is  1 .

The middle term is,  -12x  its coefficient is  -12 .

The last term, "the constant", is  +27  

Step-1 : Multiply the coefficient of the first term by the constant   1 • 27 = 27  

Step-2 : Find two factors of  27  whose sum equals the coefficient of the middle term, which is   -12 .

     

-27

  +    

-1

  =    

-28

     

-9

  +    

-3

  =    

-12

  That's it

Elena L [17]4 years ago
5 0

Answer:

Step-by-step explanation:

x² – 12x + 27 = 0

x² –9x -3x + 9*3 = 0

x(x-9) -3(x -9) = 0

(x-9)(x-3) = 0

x - 9 = 0  ; x - 3 = 0

x = 9    ; x = 3

x = 9 or 3

 

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