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August 2021
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Разложите на множители
(a+4)^2-(b+2)^2
(13t-9)^2-(8t-7)^2
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zhenyaM2002
Verified answer
(a+4)² - (b+2)² = (a+4 - (b+2))(a+4 + b+2) =
= (a+4 - b - 2)(a+b + 6) = (a-b +2)(a+b+6)
(13t -9)² - (8t -7)² = (13t -9 - (8t-7)) (13t -9 + 8t-7) =
= (13t - 9 - 8t + 7)(21t - 16) = (5t - 2)(21t - 16)
3 votes
Thanks 1
армения20171
1)=(а+4-b-2)(a+4+b+2)=(a-b+2)(a+b+6)
2)=(13t-9-8t+7)(13t-9+8t-7)=
(5t-2)(21t-16)
2 votes
Thanks 1
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Answers & Comments
Verified answer
(a+4)² - (b+2)² = (a+4 - (b+2))(a+4 + b+2) == (a+4 - b - 2)(a+b + 6) = (a-b +2)(a+b+6)
(13t -9)² - (8t -7)² = (13t -9 - (8t-7)) (13t -9 + 8t-7) =
= (13t - 9 - 8t + 7)(21t - 16) = (5t - 2)(21t - 16)
2)=(13t-9-8t+7)(13t-9+8t-7)=
(5t-2)(21t-16)