(3x+2)(2x-3)-(5x-1)(3x+1)=

Răspuns :

= (6x^2 -9x + 4x - 6 )-(15x^2 +5x-3x-1)=

=> (6x^2 - 5x -6 )-( 15x^2 + 2x -1)=

=> 6x^2 -5x -6 - 15x^2 -2x +1 =

=> -9x^2 -7x - 5
=============================
Vezi imaginea 102533