7: \(=\left(2x^2-1\right)^2\)
8: \(=\left(3x-2\right)^2\)
9: \(=\left(4x-3y\right)^2\)
10: \(=\left(4x+3y^2\right)^2\)
11: \(=\left(x+\dfrac{5}{2}\right)^2\)
12: \(=\left(4uv^2-1\right)^2\)
13: \(=\left(x+1\right)^2\)
Theo thứ tự từ trên xuống:
\(\left(2x^2-1\right)^2\)
\(\left(3x-2\right)^2\)
\(\left(4x-3y\right)^2\)
\(\left(4x+3y^2\right)^2\)
\(\left(x+\dfrac{5}{2}\right)^2\)
\(\left(4uv^2-1\right)^2\)
\(\left(x+1\right)^2\)
\(\left(x-4\right)^2\)
\(\left(\dfrac{x}{2}+1\right)^2\)
\(\left(2x-2y\right)^2\)
\(\left(2x-1\right)^2\)
\(\left(3x-2\right)^2\)
\(\left(\dfrac{ab^2}{2}+1\right)^2\)