factorize 2x^3-xy^2-y^3
khushi103:
its urgent because my test is there in coaching.
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2x^3-xy^2-y^3 = 2x^3 - xy^2 - y^3
=( x^3 - xy^2) + (x^3 - y^3)
= x(x^2 - y^2) + (x-y)(x^2+xy+y^2)
{ | fact (x^n-y^)=(x-y) [ x^(n-1) + x^(n-2)y + x^(n-3)y^2 + .....+xy^(n-2) + y^(n-1) ] }
= x(x-y)(x+y) + (x-y)(x^2+xy+y^2) (Factor is (x-y))//
= (x-y) {x(x++y) + x^2+xy+y^2}
= (x-y){x^2 + xy + x^2+xy+y^2}
= (x-y){2x^2 + 2xy =y^2}
=( x^3 - xy^2) + (x^3 - y^3)
= x(x^2 - y^2) + (x-y)(x^2+xy+y^2)
{ | fact (x^n-y^)=(x-y) [ x^(n-1) + x^(n-2)y + x^(n-3)y^2 + .....+xy^(n-2) + y^(n-1) ] }
= x(x-y)(x+y) + (x-y)(x^2+xy+y^2) (Factor is (x-y))//
= (x-y) {x(x++y) + x^2+xy+y^2}
= (x-y){x^2 + xy + x^2+xy+y^2}
= (x-y){2x^2 + 2xy =y^2}
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