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Надя1125
@Надя1125
July 2022
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решите уравнения?
1) (3х-1)(х+2)=20
2) (х-4)(4х-3)+3=0
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ekaterinkamiss
1)=3X^2+6x-x-2-20= 0 3x^2+5x-22=0 2)=4x^2-3x-16x+12+3=0 4x^2-19x+15=0
1 votes
Thanks 3
kikoba00
1) (3x-1)(x+2)=20
3x²+6x-x-2-20=0
3x²+5x-22=0
D=25+264=289
x₁=(-5-17)/6=-11/3=-3, 2/3
x₂=(-5+17)/6=2
2) (x-4)(4x-3)+3=0
4x²-3x-16x+12+3=0
4x²-19x+15=0
D=361-240=121
x₁=(19-11)/8=1
x₂=(19+11)/8=15/4=3, 3/4
11 votes
Thanks 26
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Answers & Comments
3x²+6x-x-2-20=0
3x²+5x-22=0
D=25+264=289
x₁=(-5-17)/6=-11/3=-3, 2/3
x₂=(-5+17)/6=2
2) (x-4)(4x-3)+3=0
4x²-3x-16x+12+3=0
4x²-19x+15=0
D=361-240=121
x₁=(19-11)/8=1
x₂=(19+11)/8=15/4=3, 3/4