Cevaplar

2013-01-06T15:26:52+02:00
a2 – b2 = (a – b) (a + b) a2 + b2 = (a + b)2 – 2ab ya da

a2 + b2 = (a – b)2 + 2ab dir.

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2013-01-06T15:27:03+02:00

1-)4x² -  9²=(2x-3)(2x+3)
             
      2x - 3
 
2-)(2a-3)² - (a-2)²=    

     =(2a-3)² – (a-2)²
     =[(2a-3)-(a-2)].[(2a-3)+(a-2)]
     =(2a-3-a+2).(2a-3+a-2)
     =(a-1).(3a-5)

3-)(2x-3)²-1²=
          
    = (2x-3)-1
    =[(2x-3)-1].[(2x-3)+1]
    =(2x-3-1).(2x-3+1)
    =(2x-4).(2x-2)
    =4(x-2).(x-1)

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