(2x-3)2-8x+12

 

=(2x)^2+3^2- 2*2x*3-8x+12

=4x^2 +9-12x-8x+12

= 4x^2-20x+21

=(2x-3)(2x-7) 

  • 3

here's a shorter n probably easier method :-

(2x-3)2-8x+12

 

=>(2x-3).(2x-3) -4(2x -3)

 

=>(2x -3 -4) . (2x -3)

 

=>(2x -7) . (2x -3)

 

=>4x2 +20x +21


  • 0
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