give me all formulas of polynomial class 9
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1.(x + y) = x^2 + 2xy + y^2
2.(x - y)= x^2 - 2xy + y^2
3.x^2 - y^2 = (x+y) (x-y)
4.(x+a) (x+b) = x^2 + (a+b)x + ab
5.(x+y+z)^2 = x^2 + y^2 + z^2 + 2xy + 2yz + 2xz
6.(x+y)^3 = x^3 + y^3 + 3xy(x+y)
7.(x-y)^3 = x^3 - y^3 - 3xy(x-y)
8.x^3 + y^3 + z^3 - 3xyz= (x+y+z)(x^2+y^2+z^2-xy-yz-xz)
hope it helps u
thanks
2.(x - y)= x^2 - 2xy + y^2
3.x^2 - y^2 = (x+y) (x-y)
4.(x+a) (x+b) = x^2 + (a+b)x + ab
5.(x+y+z)^2 = x^2 + y^2 + z^2 + 2xy + 2yz + 2xz
6.(x+y)^3 = x^3 + y^3 + 3xy(x+y)
7.(x-y)^3 = x^3 - y^3 - 3xy(x-y)
8.x^3 + y^3 + z^3 - 3xyz= (x+y+z)(x^2+y^2+z^2-xy-yz-xz)
hope it helps u
thanks
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