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ICSE Class 7 Answered

Find space the space value space of space the space following space expression space when space straight x space equals space minus 1 space and space straight y space equals space 1. 2 straight x cubed minus 2 xy plus straight y cubed straight x plus 3 straight x cubed straight y minus straight y cubed straight x space Please provide solution to this question
Asked by Topperlearning User | 16 Sep, 2016, 02:56: PM
answered-by-expert Expert Answer

Given space expression space can space be space simplified space as space follows. 2 straight x cubed minus 2 xy plus straight y cubed straight x plus 3 straight x cubed straight y minus straight y cubed straight x space equals space 2 straight x cubed minus 2 xy plus 3 straight x cubed straight y When space straight x space equals space minus 1 space and space straight y space equals space 1 space the space value space of space the space expression space is comma 2 straight x cubed minus 2 xy plus 3 straight x cubed straight y space equals space 2 left parenthesis negative 1 right parenthesis cubed minus 2 left parenthesis negative 1 right parenthesis left parenthesis 1 right parenthesis plus 3 left parenthesis negative 1 right parenthesis cubed left parenthesis 1 right parenthesis space equals negative 2 plus 2 minus 3 equals negative 1

Answered by | 16 Sep, 2016, 04:56: PM

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