N 2
( X - 2,5 ) * ( 2X - 3 ) * ( 4X + 9 ) = 0
X - 2,5 = 0 ; X = 2,5
2X - 3 = 0 ; X = 1,5
4X + 9 = 0 ; X = ( - 9/4 ) = ( - 2,25 )
Ответ 2,5 ; 1,5 ; ( - 2,25 )
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( 3X + 9) * ( 4X - 7 ) * ( 5X - 2 ) = 0
3X + 9 = 0 ; X = ( - 3 )
4X - 7 = 0 ; X = 7/4 = 1,75
5X - 2 = 0 ; X = 0,4
Ответ: ( - 3 ) ; 1.75 ; 0,4
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N 3
( 2A - 5)*( 3 - 7A ) = 6A - 14A^2 - 15 + 35A = - 14A^2 + 41A - 15
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( 3X - 4)*( 2X - 7) = 6X^2 - 21X - 8X + 28 = 6X^2 - 29X + 28
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( 5X - 2Y)*( 3X + 3Y) = 15X^2 + 15XY - 6XY - 6Y^2 = 15X^2 + 9XY - 6Y^2