Whakaoti mō x
x=-3
Graph
Tohaina
Kua tāruatia ki te papatopenga
2x-10-9x=11
Tangohia te 9x mai i ngā taha e rua.
-7x-10=11
Pahekotia te 2x me -9x, ka -7x.
-7x=11+10
Me tāpiri te 10 ki ngā taha e rua.
-7x=21
Tāpirihia te 11 ki te 10, ka 21.
x=\frac{21}{-7}
Whakawehea ngā taha e rua ki te -7.
x=-3
Whakawehea te 21 ki te -7, kia riro ko -3.
Ngā Tauira
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Ngā Tepe
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}