Question

phan tich da thuc thanh nhan tu

4x²-4y²-4y-1

Answer 1

\(4x^2-4y^2-4y-1\)

\(\Leftrightarrow4x^2-\left(2y+1\right)^2\)

\(\Leftrightarrow\left(2x-2y-1\right)\left(2x+2y+1\right)\)

P/s tham khảo nha

Answer 2

\(=4x^2-\left(4y^2+4y+1\right)\)

\(=4x^2-\left(4y^2+4y+1^2\right)\)

\(=\left(2x\right)^2-\left(2y+1\right)^2\)

\(=\left(2x-2y-1\right)\left(2x+2y+1\right)\)