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\left(\cos(x)\cos(y)d+2xd\right)x-\left(\sin(x)\sin(y)+2y\right)dy=0
\cos(x)\cos(y)+2x ga d ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
\cos(x)\cos(y)dx+2dx^{2}-\left(\sin(x)\sin(y)+2y\right)dy=0
\cos(x)\cos(y)d+2xd ga x ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
\cos(x)\cos(y)dx+2dx^{2}-\left(\sin(x)\sin(y)d+2yd\right)y=0
\sin(x)\sin(y)+2y ga d ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
\cos(x)\cos(y)dx+2dx^{2}-\left(\sin(x)\sin(y)dy+2dy^{2}\right)=0
\sin(x)\sin(y)d+2yd ga y ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
\cos(x)\cos(y)dx+2dx^{2}-\sin(x)\sin(y)dy-2dy^{2}=0
\sin(x)\sin(y)dy+2dy^{2} teskarisini topish uchun har birining teskarisini toping.
\left(\cos(x)\cos(y)x+2x^{2}-\sin(x)\sin(y)y-2y^{2}\right)d=0
d'ga ega bo'lgan barcha shartlarni birlashtirish.
\left(x\cos(x)\cos(y)-y\sin(x)\sin(y)+2x^{2}-2y^{2}\right)d=0
Tenglama standart shaklda.
d=0
0 ni \cos(x)\cos(y)x+2x^{2}-\sin(x)\sin(y)y-2y^{2} ga bo'lish.