Question

viết dưới dạng tổng 2 bình phương

\(4x^2+y^2+12x+4y+13\)

Answer 1

=(4x^2+12x+9)+(y^2+4y+4)

=(2x+3²)+(y+2)²

Answer 2

4x² + y² + 12x + 4y + 13

= 4x² + 12x + 9 + y² + 4y + 4

= (2x + 3)² + (y + 2)²

Answer 3

\(4x^2+y^2+12x+4y+13\)

\(=4x^2+12x+9+y^2+4y+4\)

\(=\left(2x\right)^2+2.2x.3+3^2+y^2+2.y.2+4\)

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

Answer 4

\(4x^2+y^2+12x+4y+13\)

\(=4x^2+12x+9+y^2+4y+4\)

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