A) 25 X − 16 X = 9 B) 3 2 X − 5 8 X + 7 18 X − 28 = 0...

Bài 1: a) 25 x16 x = 9 b) 3 2 x5 8 x + 7 18 x28 = 0

c) 5 15 15 2 1 15

3 xx − = 3 x d) 16 x + 169 x + + 9 4 x + + 4 x + = 1 16

e) 4 20 3 5 4 9 45 6

x + − + + x 3 x + =