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10 Calculaţi: 2x-3 3x+1, X x-5 3x+1) 15 75 2x x²-4 2x+1 [(x-1)-(5x+3) 2x+1 X-2 4x+7 +3)] 3 1 4x+10 9-x² 3+X (5+2x x-1) 5x+2 4x+7 4x+7 1 2x² -7 3x²-7) + (4x+7)³ (x−1)(5x+3) 4x 3x² -7 4x²-49 2x+7 x²-36 x-6 + X+6 2 3 x-2 x+3, 5x(x+3) 12-X 8 81 X+2 + X-2 X²-4 9​