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sofiko60
@sofiko60
July 2022
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ПОМОГИТЕ, СРОЧНО!!
решите кв. уравнение:
1) 16x²=49
2) 2x²-3x=0
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Answers & Comments
crdd
1) 16x²=49
16x²-49=0
(4x-7)(4x+7)=0
4x-7=0
4x=7
x=7/4
или
4х+7=0
4х=-7
х=-7/4
ответ: -7/4; 7/4
2) 2х²-3х=0
х(2х-3)=0
х=0
или
2х-3=0
2х=3
х=1,5
ответ: 0; 1,5
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Thanks 0
Фролуша12
1)Х1=-7/4
Х2=7/4
2)Х1=0
Х2=3/2
0 votes
Thanks 0
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Answers & Comments
16x²-49=0
(4x-7)(4x+7)=0
4x-7=0
4x=7
x=7/4
или
4х+7=0
4х=-7
х=-7/4
ответ: -7/4; 7/4
2) 2х²-3х=0
х(2х-3)=0
х=0
или
2х-3=0
2х=3
х=1,5
ответ: 0; 1,5
Х2=7/4
2)Х1=0
Х2=3/2