TÌM X BIẾT 1X2 − X− X=−).1(1A) 14.2 424B) 3(1 - 4X)(X - 1) + 4(3X -...
Bài 1: Tìm x biết
1
x
2
−
x
−
x
=
−
).
1
(
1
a)
14
.
2
4
2
4
b) 3(1 - 4x)(x - 1) + 4(3x - 2)(x + 3) = - 27
c) (x + 3)(x
2
- 3x + 9) – x(x - 1)(x+1) = 27.
d) 6x(5x + 3) + 3x(1 – 10x) = 7
e) (3x – 3)(5 – 21x) + (7x + 4)(9x – 5) = 44
f) (x + 1)(x + 2)(x + 5) – x
2
(x + 8) = 27