- 3X^2 - 54X + 6 = - 3 * ( X^2 + 18X - 2 )
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D = 324 + 8 = 332
√ D = √ 332 = √ ( 64 * 5,1875 ) = 8 √ 5,1875
X1 = ( - 18 + 8 √ 5,1875 ) : 2 = - 9 + 4 √ 5,1875
X2 = - 9 - 4 √ 5,1875
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X1 > X2
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Ответ Max-ное значение при Х = ( - 9 + 4 √ 5,1875 )