Question

Answer 1

\(a,=\left(y+1\right)^2\\ b,=\left(3x-y\right)^2\\ c,=\left(5a+2b\right)^2\)

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

Answer 2

a: \(y^2+2y+1=\left(y+1\right)^2\)

b: \(9x^2-6xy+y^2=\left(3x-y\right)^2\)

c: \(25a^2+20ab+4b^2=\left(5a-2b\right)^2\)