Question

cần gấp:(

 

Answer 1

Bài 3:

a: \(4x^2+4x+1=\left(2x+1\right)^2\)

b: \(9x^2-12x+4=\left(3x-2\right)^2\)

c: \(ab^2+\dfrac{1}{4}a^2b^4+1=\left(\dfrac{1}{2}ab^2+1\right)^2\)

d: \(x^2+x+\dfrac{1}{4}=\left(x+\dfrac{1}{2}\right)^2\)