(6x - 1)^2 - (3x - 5)^2 = 0
(6x - 1 - (3x - 5)) (6x - 1 + 3x - 5) = 0
(6x - 1 - 3x + 5) (6x - 1 + 3x - 5) = 0
(3x + 4 )(9x - 6) = 0
1) 3x + 4 = 0
3x = - 4
x = - 4/3
2) 9x - 6 = 0
9x = 6
x = 2/3
2) 4=a1+3d
36=a1+11d
8d=32
d=4
4=a1+3d
a1=4-3d=4-3*4=-8
380=3.8×10^2
0.038=3.8×10^-2
38=3.8×10^1