(x - 1)(x - 9)=0, x(x + 3) - 2(x + 3) = 0, x2 - 7x + 10 = 0, x2 - 6x + 8=0, x2 + 8x + 16 = 0, 5x2 - 10x + 5 = 0 , 3x2 - 5x + 2 = 0, x2 - 6x + 8 = 0, 3x2 + 6x + 1 = 0, 6x2 - 4x - 2 = 0, x2 + 3x - 1 = 0, x2 - 11x + 28 = 0, (x + 3)2 - 5 = 1 + 2x2, 3x(x - 4) + 7 = 2x - 1, 5x2 + 10x + 1 = 0, (x - 2)(x + 2) = 3x, 3x(x - 1) + 4x - 4 = 0, (x+2)/(x-2) = 2x/(x+1), (x2+5)/2 – 4 = (-1-3x)/4, 9(x2+1) = 9.

Aplicații - Ecuația de gradul al II-lea - clasa a VIII-a

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