4X - 2 = 2X^2 - 3X + 4
2X^2 - 3X - 4X + 4 + 2 = 0
2X^2 - 7X + 6 = 0
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D = 49 - 4*2*6 = 49 - 48 = 1
V D = 1
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X1 = ( 7 + 1 ) : 4 = 2
X2 = 6 : 4 = 1.5
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Y = 4X - 2
Y1 =4*2 - 2 = 6
Y2 = 4 *1.5 - 2 = 4
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ответ ( 2 ; 6 ) и ( 1.5 ; 4 )