TÌM X, BIẾT A) (X – 2)2 – (X – 3)(X + 3) = 6 . B) 4(X – 3)2 – (2X –...
Bài 1: Tìm x, biết
a) (x – 2)
2
– (x – 3)(x + 3) = 6 . b) 4(x – 3)
2
– (2x – 1)(2x + 1) = 10
c) (x – 4)
2
– (x – 2)(x + 2) = 6. d) 9 (x + 1)
2
– (3x – 2)(3x + 2) = 10
f)
2x2
720g)
x x
3
x2
5 0.
h)
x2
6x0i)
2x3
5x2
12x0