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x+y(z-x)-(x+y+z)= x+yz-xy-x-y-z=yz-xy-y-z এখন, x=3,y=7,z=8 বসিয়ে পাই, yz-xy-y-z=20

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দেওয়া অাছে, x=3 y=7 z=8 এখন,  x+y(z-x)-(x+y+z) =3+7(8-3)-(3+7+8) =3+7×5-18 =3+35-18 =38-18 =20

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