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vikaCat12367
@vikaCat12367
July 2022
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упростите выражение ;
а)( a-1 )( a+3)-(a+1)^2
б)(x-y)(x+y)(x^2 + y^2)
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debnatkh
A) (a-1)(a+3)-(a+1)^2 = a ^ 2 + 2 a - 3 - a^2 - 2 a - 3 = -4
б) (x-y)(x+y)(x^2+y^2)=(x^2-y&2)(x^2+y^2)=x^4-y^4
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Answers & Comments
б) (x-y)(x+y)(x^2+y^2)=(x^2-y&2)(x^2+y^2)=x^4-y^4