Question

Bai 1:

a,2xy^2+x^2y^2+1

b,9x^2+4y^2-12xy

Answer 1

a) 2xy+x²y²+1

=(xy+1)²

b) 9x²+4y²-12xy

=3²x²+2²y²-12xy

=(3x-2y)²

Answer 2

\(a,2xy+x^2y^2+1\)
\(=x^2y^2+2xy+1\)
\(=\left(xy+1\right)^2\)
\(b,9x^2+4y^2-12xy\)
\(=\left(3x\right)^2-12xy+\left(2y\right)^2\)
\(=\left(3x-2y\right)^2\)