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saashakuts
@saashakuts
July 2023
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розв'яжіть рівняння
а) 5х³-20х=0;
б) 49х+14х²+х³=0;
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а) 5х^3-20х=0
5х(х^2-4)=0
х(х^2-4)=0
х=0,х^2-4=0
х=0,х=-2,х=2
х1=-2; х2=0; х3=2
б)49х+14х^2+х^3=0
х(49+14х+х^2)=0
х(7+х)^2=0
х=0;(7+х)^2=0
х=0; х=-7
х1=-7;х2=0
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Verified answer
а) 5х^3-20х=05х(х^2-4)=0
х(х^2-4)=0
х=0,х^2-4=0
х=0,х=-2,х=2
х1=-2; х2=0; х3=2
б)49х+14х^2+х^3=0
х(49+14х+х^2)=0
х(7+х)^2=0
х=0;(7+х)^2=0
х=0; х=-7
х1=-7;х2=0