(7,42*5/9-(-11,48):9/5):0,35 = (37,1/9:9/5-(-11,48)):0,35 = (37,1/5-(-11,48)):0,35 = (7,42-(-11,48)):0,35 = 18,9:0,35 = 54
Y=2*(-3)-4=-6-4=-10
y=2x-4 ,x=-3
<span> (х+у)</span>²<span>/6 + (х-у)</span>²<span>/12 - х</span>²<span>-у</span>²<span>/4
x</span>²+2xy+y²/6+x²-2xy+y²/12-x²-y²/4
2(x²+2xy+y²)+x²-2xy+y²-3(x²-y²)
2x²+4xy+2y²+x²-2xy+y²-3x²+3y²/12
0+2xy+6y²/12
2(xy+3y²)/12
xy+3y²/6
3^4n * 5^2n : 45^(2n-1)=9^2n* 5^2n : 45^(2n-1)=(9*5)^2n: 45^(2n-1)=