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(5x-1)(x+2)=? Va rog repede!

Răspuns :

(5x-1)(x+2) = 5 + 10x - x -2 = 5 + 9x - 2 .




(5x-1)(x+2)=5x ori x+5x ori 2 - 1 ori x -1 ori 2 = 5x la puterea a doua + 10x -x - 2 = 5x la puterea a doua +9x -2 .