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dveretenn
@dveretenn
July 2022
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разложите на множители
1).a^2-b^2-a-b
2).9a^2+6ac+c^2-9
3).16x^-25y^2-4x-5y
4).a^2-b^2-10b-25
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tamarabernukho
1).a^2-b^2-a-b=(a-b)(a+b)-(a+b)=(a+b)(a-b-1)
2).9a^2+6ac+c^2-9=(3a+c)
²-3²=(3a+c+3)(3a+c-3)
3).16x^2-25y^2-4x-5y=(4x-5y)(4x+5y)-(4x+5y)=(4x+5y)(4x-5y-1)
4).a^2-b^2-10b-25=a
²-(b+5)²=(a+b+5)(a-b-5)
2 votes
Thanks 1
dveretenn
спасибо!!!
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Answers & Comments
2).9a^2+6ac+c^2-9=(3a+c)²-3²=(3a+c+3)(3a+c-3)
3).16x^2-25y^2-4x-5y=(4x-5y)(4x+5y)-(4x+5y)=(4x+5y)(4x-5y-1)
4).a^2-b^2-10b-25=a²-(b+5)²=(a+b+5)(a-b-5)