= ( 3X^2 + X^2 ) + ( - 5X + 2X + 3X) + ( - 4 - 1 ) =
= 4X^2 - 5
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X = 1/2 = 0.5
4 * ( 0.5)^2 - 5 = 4 * 0.25 - 5 = 1 - 5 = ( - 4 )
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ответ ( - 4 )
2(x-3)/1/(3x-1)=4
2x-3/1/(3x-1)=4
2x-3/3x-1=4
2x-3=4(3x-1)
2x-3=12x-4
10x=1 |:10
x = 1/10