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Jan0215
@Jan0215
July 2022
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Упростите выражение : 1) (а-3)^2 + а(а+9) ; 2) 9b(b-1)-(3b+2)^2 ; 3) (a+3)(5-a)-(a-1)^2 ; 4)b^2 +49-(b-7)^2 ; 5)a^2b^2-(ab-y)^2
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serogodski053
1) a^2-6a+9+a^2+9a=2a^2+3a+9=a(2a+3)+9
2) 9b^2-9b-9b^2-12b-4=-21b-4
3)-2a^2+3a+14
4)b^2+49-b^2+14b-49=14b
5)a^b^2-a^2b^2+2aby-y^2=2aby-y^2
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Answers & Comments
2) 9b^2-9b-9b^2-12b-4=-21b-4
3)-2a^2+3a+14
4)b^2+49-b^2+14b-49=14b
5)a^b^2-a^2b^2+2aby-y^2=2aby-y^2