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Eliminati parantezele: 1)(3X-4)(5X+4) 2) (5X-1)²

Răspuns :

1. 15x^2+12x-20x-16= 15x ^ 2 - 8x - 16
2. (5x)^2 - 2*5x*1+1^2 = 25x ^2 -10x + 1
1)15x+12x-20x-16x=-9x
2) 25xla a2a-10x+1