Question

упростите выражение 3(x+y)^2-6xy

Answer 1

3(х+у)^2-6xy=3(x^2+2xy+y^2)-6xy=3x^2+6xy+3y^2-6xy=3(x^2+y^2).

Answer 2

3*(х^2+2*у*х+у^2)-6ху=3х^2+6ху+у^2-6ху= 3х^2+у^2