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АдольфВанини
@АдольфВанини
July 2022
2
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Разложите на множители:
1)(2a-3)²-81
2)(3b-4)²-(b+7)²
3)m^6-(m²-3)²
4)(a-b-c)²-(a+b-c)²
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Answers & Comments
ganibaevadel
1)4a^2-12a-72
2)8b^2-38b-33
3)m^6-m^4+6m^2-9
4)-4ab+4bc
0 votes
Thanks 0
AYQERIM
1)(2a-3)²-81=(2a-3-9)(2a-3+9)=(2a-12)(2a+6)=4(a-6)(a+3)
2)(3b-4)²-(b+7)²=(3b-4-b-7)(3b-4+b+7)=(2b-11)(4b+3)
3)m^6-(m²-3)²=(m3-m²+3)(m3+m²-3)
4)(a-b-c)²-(a+b-c)²=(a-b-c-a-b+c)(a-b-c+a+b+c)=-4ab
3 votes
Thanks 4
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Answers & Comments
2)8b^2-38b-33
3)m^6-m^4+6m^2-9
4)-4ab+4bc
2)(3b-4)²-(b+7)²=(3b-4-b-7)(3b-4+b+7)=(2b-11)(4b+3)
3)m^6-(m²-3)²=(m3-m²+3)(m3+m²-3)
4)(a-b-c)²-(a+b-c)²=(a-b-c-a-b+c)(a-b-c+a+b+c)=-4ab