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uliasamoylenko
@uliasamoylenko
October 2021
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Номер 697(б,г)
С объяснениями пожалуйста
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m11m
Verified answer
697.
б)
(1-2x)(1-3x)=(6x-1)x-1
1-2x-3x+6x²=6x²-x-1
1-5x+6x²=6x²-x-1
6x²-6x²-5x+x=-1-1
-4x= -2
x= -2 : (-4)
x=0.5
Ответ: 0,5
г)
(x+4)(x+1)=x-(x-2)(2-x)
x²+4x+x+4=x+(2-x)(2-x)
x²+5x+4=x+4-4x+x²
x²-x²+5x+3x=4-4
8x=0
x=0
Ответ: 0.
0 votes
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Answers & Comments
Verified answer
697.б)
(1-2x)(1-3x)=(6x-1)x-1
1-2x-3x+6x²=6x²-x-1
1-5x+6x²=6x²-x-1
6x²-6x²-5x+x=-1-1
-4x= -2
x= -2 : (-4)
x=0.5
Ответ: 0,5
г)
(x+4)(x+1)=x-(x-2)(2-x)
x²+4x+x+4=x+(2-x)(2-x)
x²+5x+4=x+4-4x+x²
x²-x²+5x+3x=4-4
8x=0
x=0
Ответ: 0.