x+7/x-5 +3x+1/2 is greater then equal to 0
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x + 7/x - 5 + 3x + 1/2
= ( x+3x ) + 7/x + 1/2 - 5
= 4x + 7/x + 1/2 - 5
= 4x + ( 14 + x/2x ) - 5
= 4x + 15x/2x - 5
= ( 8x^2 + 15x / 2x ) - 5
= 8x^2/2x + 15x/2x = 5
= 4x = 5 - 15/2
= 4x = ( 10 -15 / 2)
= 4x = -5/2
= x = -5/2 x 1/4
=x = -5/8
Therefore -5/8 is smaller than 0
= ( x+3x ) + 7/x + 1/2 - 5
= 4x + 7/x + 1/2 - 5
= 4x + ( 14 + x/2x ) - 5
= 4x + 15x/2x - 5
= ( 8x^2 + 15x / 2x ) - 5
= 8x^2/2x + 15x/2x = 5
= 4x = 5 - 15/2
= 4x = ( 10 -15 / 2)
= 4x = -5/2
= x = -5/2 x 1/4
=x = -5/8
Therefore -5/8 is smaller than 0
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