...=9х2-12ху+4у2-4х2+4ху-у2=5х2-8ху+3у2.
х=2,35 у=-1,65
5*5,5225+8*2,35*1,65+3*2,7225=27,6125+31,02+8,1675=66,8
(3x-2y)^2-(2x-y)^2=9x^2-12xy+4y^2-4x^2+4xy-y^2=5x^2-8xy+3y^2
5x^2-8xy+3y^2=5*(2.35)^2-8*(2.35)*(-1.65)+3*(-1.65)^2=2209/80+31.02+3*(-1.65)^2=66.8
...=9х2-12ху+4у2-4х2+4ху-у2=5х2-8ху+3у2.
х=2,35 у=-1,65
5*5,5225+8*2,35*1,65+3*2,7225=27,6125+31,02+8,1675=66,8
(3x-2y)^2-(2x-y)^2=9x^2-12xy+4y^2-4x^2+4xy-y^2=5x^2-8xy+3y^2
5x^2-8xy+3y^2=5*(2.35)^2-8*(2.35)*(-1.65)+3*(-1.65)^2=2209/80+31.02+3*(-1.65)^2=66.8