Whakaoti mō x
x=2\sqrt{30}\approx 10.95445115
x=-2\sqrt{30}\approx -10.95445115
Graph
Tohaina
Kua tāruatia ki te papatopenga
49+x^{2}=13^{2}
Tātaihia te 7 mā te pū o 2, kia riro ko 49.
49+x^{2}=169
Tātaihia te 13 mā te pū o 2, kia riro ko 169.
x^{2}=169-49
Tangohia te 49 mai i ngā taha e rua.
x^{2}=120
Tangohia te 49 i te 169, ka 120.
x=2\sqrt{30} x=-2\sqrt{30}
Tuhia te pūtakerua o ngā taha e rua o te whārite.
49+x^{2}=13^{2}
Tātaihia te 7 mā te pū o 2, kia riro ko 49.
49+x^{2}=169
Tātaihia te 13 mā te pū o 2, kia riro ko 169.
49+x^{2}-169=0
Tangohia te 169 mai i ngā taha e rua.
-120+x^{2}=0
Tangohia te 169 i te 49, ka -120.
x^{2}-120=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(-120\right)}}{2}
Kei te āhua arowhānui tēnei whārite: ax^{2}+bx+c=0. Me whakakapi 1 mō a, 0 mō b, me -120 mō c i te tikanga tātai pūrua, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.
x=\frac{0±\sqrt{-4\left(-120\right)}}{2}
Pūrua 0.
x=\frac{0±\sqrt{480}}{2}
Whakareatia -4 ki te -120.
x=\frac{0±4\sqrt{30}}{2}
Tuhia te pūtakerua o te 480.
x=2\sqrt{30}
Nā, me whakaoti te whārite x=\frac{0±4\sqrt{30}}{2} ina he tāpiri te ±.
x=-2\sqrt{30}
Nā, me whakaoti te whārite x=\frac{0±4\sqrt{30}}{2} ina he tango te ±.
x=2\sqrt{30} x=-2\sqrt{30}
Kua oti te whārite te whakatau.
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