Tìm x

----- Nội dung ảnh -----
Bài 2. Tìm x
1) \( 0,75 \cdot x^2 = \left( \frac{3}{4} \right)^5 \)
2) \( \left( \frac{2x-1}{3} \right)^2 = \frac{1}{4} \)
3) \( 3^{x+1} - 3^x = 54 \)
4) \( 8^{x+3} + 2^{3x} - 2^9 = 2^{18} \)
5) \( (4x^2 - 9)(3x + 2) = 0 \)