Unfortunately, your notation isn't clear. But, in general, square roots can be eliminated by squaring both sides of an equation. If you mean
sqrt(5x + 1) - sqrt(3x) = 1,
start by squaring both sides. You get
5x + 1 - 2*sqrt(15x^2 + 3x) + 3x = 1
8x = 2*sqrt(15x^2 + 3x)
Then square both sides again and combine like terms, and you'll have a straightforward quadratic equation to solve.
2007-08-08 02:57:21
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answer #1
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answered by DavidK93 7
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Q: (5x + 1)root + (-3x)root = 1
Sol:
· (5x + 1)root = 1 – (-3x)root
i have replaced root by 1/2
i.e to the power 1/2
Do square on both the sides.
· ((5x + 1)1/2 )2 = (1 – (-3x)1/2 )2
· 5x + 1 = 1 – 2(1)(-3x)1/2 – 3x
· 5x + 1 – 1 + 3x = -2(-3x)1/2
· 8x = -2(-3x)1/2
· 8x / (-2) = (-3x)1/2
· -4x = (-3x)1/2
Do square on both the sides.
· (-4x )2 = ((-3x)1/2 )2
· 16x2 = -3x
· So,
· x = 0 or 16x = -3
· Hence x = 0 or x = -16/3
2007-08-08 03:25:14
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answer #2
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answered by yash 2
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5x+1 root = 1+ (3x root)
5x+1 = 1+3x+ (6x root)
2x = 6x root
x = 3x root
x root = 3 root
x = 3
2007-08-08 03:08:20
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answer #3
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answered by Andre M 1
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I think you mean sqrt(5x+1) - sqrt(3x) = 1. If so, then
sqrt(5x+1) = 1 + sqrt(3x). Square both sides:
5x + 1 = 1 + 3x + 2sqrt(3x), or
2x = 2 sqrt(3x), or
x = sqrt(3x),
x = 3.
2007-08-08 03:03:29
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answer #4
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answered by John V 6
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5x+1-3x= n
5x-1-3x= -1
5x-3x= -1
2x= -1
multiply both sides by 1/2
x= -1/2
2007-08-08 02:59:56
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answer #5
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answered by Anonymous
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2007-08-08 02:57:21
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answer #6
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answered by Koko ; 4
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