-3x的平方+11x-6=0用因式分解法怎么解
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-3x” + 11x - 6 = 0,
3x” - 11x + 6 = 0,
3x” - 9x - 2x + 6 = 0,
3x( x - 3 ) - 2( x - 3 ) = 0,
( x - 3 )( 3x - 2 ) = 0,
或者
3x” - 11x + 6 = 0,
3x” - 2x - 9x + 6 = 0,
x( 3x - 2 ) - 3( 3x - 2 ) = 0,
( x - 3 )( 3x - 2 ) = 0,
或者配方
36x” - 132x + 72 = 0,
(6x)” - 22(6x) + 11” - 121 + 72 = 0,
( 6x - 11 )” - 49 = 0,
( 6x - 11 )” - 7” = 0,
( 6x - 11 - 7 )( 6x - 11 + 7 ) = 0,
( 6x - 18 )( 6x - 4 ) = 0,
( x - 3 )( 3x - 2 ) = 0,
解方程得,
x1 = 3,
x2 = 2/3,
3x” - 11x + 6 = 0,
3x” - 9x - 2x + 6 = 0,
3x( x - 3 ) - 2( x - 3 ) = 0,
( x - 3 )( 3x - 2 ) = 0,
或者
3x” - 11x + 6 = 0,
3x” - 2x - 9x + 6 = 0,
x( 3x - 2 ) - 3( 3x - 2 ) = 0,
( x - 3 )( 3x - 2 ) = 0,
或者配方
36x” - 132x + 72 = 0,
(6x)” - 22(6x) + 11” - 121 + 72 = 0,
( 6x - 11 )” - 49 = 0,
( 6x - 11 )” - 7” = 0,
( 6x - 11 - 7 )( 6x - 11 + 7 ) = 0,
( 6x - 18 )( 6x - 4 ) = 0,
( x - 3 )( 3x - 2 ) = 0,
解方程得,
x1 = 3,
x2 = 2/3,
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