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Shox55
@Shox55
July 2022
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Помогите с уравнениями:
(х+1/2)(х-1/2) = 5/16
(3х+1,5) (3х-1,5) = 54
3х^2 - 4x / 2 = 5x^2 - x / 3
2x-3x^2 / 5 - 7х^2 - х / 4 = x^2 / 2
Знак / обозначает дробную черту, а ^ квадрат )
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Answers & Comments
nadjafova91
1) (х+1/2)(х-1/2) = 5/16
x^2-1/4=5/16
x^2=9/4
x=-3,3
2) (
3х+1,5) (3х-1,5) = 54
9x^2-2,25=54
9x^2=56,25
x^2=6,25
x=-2,5 ; 2,5
3)
3х^2 - 4x / 2 = 5x^2 - x / 3
x/3-4x/2=5x^2-3x^2
-10x/6=2x^2
x=-6/5
4)
2x-3x^2 / 5 - 7х^2 - х / 4 = x^2 / 2
(8x-x)/4=x^2/2+3x^2/5+7x^2
7x/4=(5x^2+6x^2+70x^2)
x=35/162
2 votes
Thanks 1
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Answers & Comments
x^2-1/4=5/16
x^2=9/4
x=-3,3
2) (3х+1,5) (3х-1,5) = 54
9x^2-2,25=54
9x^2=56,25
x^2=6,25
x=-2,5 ; 2,5
3) 3х^2 - 4x / 2 = 5x^2 - x / 3
x/3-4x/2=5x^2-3x^2
-10x/6=2x^2
x=-6/5
4) 2x-3x^2 / 5 - 7х^2 - х / 4 = x^2 / 2
(8x-x)/4=x^2/2+3x^2/5+7x^2
7x/4=(5x^2+6x^2+70x^2)
x=35/162