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kow [346]
3 years ago
12

Find the value of x 2+4( 3 + 2x ) = 3x + 8

Mathematics
2 answers:
solniwko [45]3 years ago
8 0
2 + 4(3+2x) = 3x + 8

2 + 12 + 8x = 3x + 8

14 - 8 = 3x - 8x

6 = -5x

x = -6/5
nasty-shy [4]3 years ago
7 0
 2 + 4 ( 3 + 2x ) = 3x + 8
 2 + 12 + 8x = 3x + 8
14 + 8x = 3x + 8
 8x - 3x = 8 - 14
 5x = -6
 x = -1.2

hope this helps
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Then either x^(5/3) = 0, or 3 - 4x^(2/3) = 0.

In the latter case, 4x^(2/3) = 3. 

To solve this:  mult. both sides by x^(-2/3).  Then we have

4x^(2/3)x^(-2/3) = 3x^(-2/3),            or 4 = 3x^(-2/3).  It'd be easier to work with this if we rewrote it as

4           3
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Then 

4
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Check this result!  subst. 0.65 for x in the given equation.  Is the equation then true?

My method here was a bit roundabout, and longer than it should have been.  Can you think of a more elegant (and shorter) solution?
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3 years ago
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So, The additive inverse of polynomial being subtracted : -0.612-8+181

So, Option B is true

Hence the additive inverse of the polynomial  being subtracted is -0.612-8+181

5 0
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