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garlicc
@garlicc
July 2022
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помогите плес, очень нужно
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zhenyaM2002
Verified answer
(с+4)(с-1) -с² = с² - с +4с - 4 -с² = 3с -4
7(х+8) +(х+8)(х-8) = 7х + 7*8 + х² - 8² = х² + 7х - (64 - 56) = х² +7х - 8
(3-4х)16х + (8х - 3)² = 48х - 64х² +( 8х)² - 2*8х*3 + 3² =
= (48х - 48х) + (-64х² + 64х²) + 9 = 9
8х² - 8у² = 8(х² - у²) = 8(х-у)(х+у)
-а² + 6а - 9 = - (а² - 2*а*3 + 3²) = -(а - 3)² = - (a-3)(a-3)
а⁴b² - b⁴a² = a²b² (a² - b²) = a²b²(a-b)(a+b)
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Answers & Comments
Verified answer
(с+4)(с-1) -с² = с² - с +4с - 4 -с² = 3с -47(х+8) +(х+8)(х-8) = 7х + 7*8 + х² - 8² = х² + 7х - (64 - 56) = х² +7х - 8
(3-4х)16х + (8х - 3)² = 48х - 64х² +( 8х)² - 2*8х*3 + 3² =
= (48х - 48х) + (-64х² + 64х²) + 9 = 9
8х² - 8у² = 8(х² - у²) = 8(х-у)(х+у)
-а² + 6а - 9 = - (а² - 2*а*3 + 3²) = -(а - 3)² = - (a-3)(a-3)
а⁴b² - b⁴a² = a²b² (a² - b²) = a²b²(a-b)(a+b)