Whakaoti mō x
x=\sqrt{7}\approx 2.645751311
x=-\sqrt{7}\approx -2.645751311
Graph
Tohaina
Kua tāruatia ki te papatopenga
9+x^{2}=4^{2}
Tātaihia te 3 mā te pū o 2, kia riro ko 9.
9+x^{2}=16
Tātaihia te 4 mā te pū o 2, kia riro ko 16.
x^{2}=16-9
Tangohia te 9 mai i ngā taha e rua.
x^{2}=7
Tangohia te 9 i te 16, ka 7.
x=\sqrt{7} x=-\sqrt{7}
Tuhia te pūtakerua o ngā taha e rua o te whārite.
9+x^{2}=4^{2}
Tātaihia te 3 mā te pū o 2, kia riro ko 9.
9+x^{2}=16
Tātaihia te 4 mā te pū o 2, kia riro ko 16.
9+x^{2}-16=0
Tangohia te 16 mai i ngā taha e rua.
-7+x^{2}=0
Tangohia te 16 i te 9, ka -7.
x^{2}-7=0
Ko ngā tikanga tātai pūrua pēnei i tēnei nā, me te kīanga tau x^{2} engari kāore he kīanga tau x, ka taea tonu te whakaoti mā te whakamahi i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}, ina tuhia ki te tānga ngahuru: ax^{2}+bx+c=0.
x=\frac{0±\sqrt{0^{2}-4\left(-7\right)}}{2}
Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi 1 mō a, 0 mō b, me -7 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\left(-7\right)}}{2}
Pūrua 0.
x=\frac{0±\sqrt{28}}{2}
Whakareatia -4 ki te -7.
x=\frac{0±2\sqrt{7}}{2}
Tuhia te pūtakerua o te 28.
x=\sqrt{7}
Nā, me whakaoti te whārite x=\frac{0±2\sqrt{7}}{2} ina he tāpiri te ±.
x=-\sqrt{7}
Nā, me whakaoti te whārite x=\frac{0±2\sqrt{7}}{2} ina he tango te ±.
x=\sqrt{7} x=-\sqrt{7}
Kua oti te whārite te whakatau.
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