Разложите на множители:
1. (3b-5)^2-49
2. (2x-3)^2-(x+4)^2
3. a^4-(a-7)^2
4. (a-b+c)^2(a-b-c)^2
1. (3b-5)^2-49
2. (2x-3)^2-(x+4)^2
3. a^4-(a-7)^2
4. (a-b+c)^2(a-b-c)^2
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Answers & Comments
Ответ:
1. = 3(b-4)(3b+2)
2. = (x-7)(3x+1)
3. = (a²-a+7)(a²+a-7)