1) 2(x^2+x+1)^2 - 7(x-1)^2 = 13(x^3-1) 2) -(x^2+x-6)^2 + (x+3)^4 = 2(x-2)^4
L lalakem 8 Tháng tám 2010 #21 1) 2(x^2+x+1)^2 - 7(x-1)^2 = 13(x^3-1) 2) -(x^2+x-6)^2 + (x+3)^4 = 2(x-2)^4