Bài 16:
1) \(x^2+4x+4=\left(x+2\right)^2\)
2) \(x^2+6x+9=\left(x+3\right)^2\)
3) \(4x^2+4x+1=\left(2x+1\right)^2\)
4) \(9+12x+4x^2=\left(2x+3\right)^2\)
5) \(x^2-2x+1=\left(x-1\right)^2\)
6) \(x^2-8x+16=\left(x-4\right)^2\)
7) \(36-12x+x^2=\left(x-6\right)^2\)
8) \(4x^2-12xy+9y^2=\left(2x+3y\right)^2\)
9) \(9x^2-6x+1=\left(3x-1\right)^2\)
10) \(4x^2+12x+9=\left(2x+3\right)^2\)
11) \(x^2+3x+\dfrac{9}{4}=\left(x+\dfrac{3}{2}\right)^2\)
12) \(4x^2-6x+\dfrac{9}{4}=\left(2x-\dfrac{3}{2}\right)^2\)
Bài 16:
1: \(x^2+4x+4=\left(x+2\right)^2\)
2: \(x^2+6x+9=\left(x+3\right)^2\)
3: \(4x^2+4x+1=\left(2x+1\right)^2\)
4: \(4x^2+12x+9=\left(2x+3\right)^2\)
5: \(x^2-2x+1=\left(x-1\right)^2\)
6: \(x^2-8x+16=\left(x-4\right)^2\)
7: \(36-12x+x^2=\left(6-x\right)^2\)
8: \(4x^2-12xy+9y^2=\left(2x-3y\right)^2\)