bài 1: tìm x a, (x – 4) ² – 25 = 0 b, ( 3x – 7) ² – 4(x+1) ²=0 c, x ³ + x ² + x +1 = 0 d, x ³+x ² – x – 1= 0 e, (2x – 1) ³ – 4(x ²+1) (2x -1) = 0 f,
bài 1: tìm x a, (x – 4) ² – 25 = 0 b, ( 3x – 7) ² – 4(x+1) ²=0 c, x ³ + x ² + x +1 = 0 d, x ³+x ² – x – 1= 0 e, (2x – 1) ³ – 4(x ²+1) (2x -1) = 0 f, … Đọc tiếp