Whakaoti mō x
x=4
Graph
Tohaina
Kua tāruatia ki te papatopenga
\left(x-1\right)\times 2+\left(x-1\right)\left(x+2\right)=\left(x+2\right)x
Tē taea kia ōrite te tāupe x ki tētahi o ngā uara -2,1 nā te kore tautuhi i te whakawehenga mā te kore. Me whakarea ngā taha e rua o te whārite ki te \left(x-1\right)\left(x+2\right), arā, te tauraro pātahi he tino iti rawa te kitea o x+2,x-1.
2x-2+\left(x-1\right)\left(x+2\right)=\left(x+2\right)x
Whakamahia te āhuatanga tohatoha hei whakarea te x-1 ki te 2.
2x-2+x^{2}+x-2=\left(x+2\right)x
Whakamahia te āhuatanga tuaritanga hei whakarea te x-1 ki te x+2 ka whakakotahi i ngā kupu rite.
3x-2+x^{2}-2=\left(x+2\right)x
Pahekotia te 2x me x, ka 3x.
3x-4+x^{2}=\left(x+2\right)x
Tangohia te 2 i te -2, ka -4.
3x-4+x^{2}=x^{2}+2x
Whakamahia te āhuatanga tohatoha hei whakarea te x+2 ki te x.
3x-4+x^{2}-x^{2}=2x
Tangohia te x^{2} mai i ngā taha e rua.
3x-4=2x
Pahekotia te x^{2} me -x^{2}, ka 0.
3x-4-2x=0
Tangohia te 2x mai i ngā taha e rua.
x-4=0
Pahekotia te 3x me -2x, ka x.
x=4
Me tāpiri te 4 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.
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