Question 1179304
{{{(3x - y)^5}}}

={{{(5C0)(3x)^(5-0)*(-y)^0 +(5C1)(3x)^(5-1)*(-y)^1+(5C2)(3x)^(5-2)*(-y)^2+(5C3)(3x)^(5-3)*(-y)^3+(5C4)(3x)^(5-4)*(-y)^4+(5C5)(3x)^(5-5)*(-y)^5}}}

={{{1*3^5*x^5*1+5*3^4x^4(-y)^1 +10*3^3x^3(-y)^2+10*3^2x^2(-y)^3+5*3^1x^1(-y)^4+1*3^0x^0(-y)^5}}}

={{{243x^5-405x^4* y +270x^3*y^2-90x^2*y^3+15xy^4-y^5}}}