Question

Ai giúp e với ạ e cần gấp trong chiều nay!

Answer 1

Bài 2: 

a: \(x^2-6x-y^2-4y+5\)

\(=x^2-6x+9-\left(y^2+4y+4\right)\)

\(=\left(x-3\right)^2-\left(y+2\right)^2\)

b: \(4a^2-12a-b^2+2b+8\)

\(=4a^2-12a+9-\left(b^2-2b+1\right)\)

\(=\left(2a-3\right)^2-\left(b-1\right)^2\)

c: \(\left(x+y-3\right)\left(x+y+3\right)\)

\(=\left(x+y\right)^2-3^2\)

d: \(\left(3z+x+2y\right)\left(2y-x+3z\right)\)

\(=\left(2y+3z\right)^2-x^2\)