( x ^ { 9 } ) ( - x ^ { 10 } ) ( x ^ { 11 } ) ( - x ^ { 12 } ) – InterviewSolution

1.	( x ^ { 9 } ) ( - x ^ { 10 } ) ( x ^ { 11 } ) ( - x ^ { 12 } )
Answer» as negative x have even powers hence it will become positiveusing laws of indicesx^a*x^b=x^a+bhence x^9+12+11+10=x^42

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