Question

Answer 1

\(1,9x^2+12xy+4y^2=\left(3x+2y\right)^2\\ 2,25x^2-40xy+16y^2=\left(5x-4y\right)^2\\ 3,\left(3x-5y\right)\left(3x+5y\right)=9x^2-25y^2\\ 4,\left(2x-3y\right)\left(4x^2+6xy+9y^2\right)=8x^3-27y^3\)