x uchun yechish
x=\sqrt{2}\approx 1,414213562
x=-\sqrt{2}\approx -1,414213562
Grafik
Baham ko'rish
Klipbordga nusxa olish
x=\sqrt{2} x=-\sqrt{2}
Tenglamaning ikkala tarafining kvadrat ildizini chiqarish.
x^{2}-2=0
Ikkala tarafdan 2 ni ayirish.
x=\frac{0±\sqrt{0^{2}-4\left(-2\right)}}{2}
Ushbu tenglama standart shaklidadir: ax^{2}+bx+c=0. Kvadrat tenglama formulasida, \frac{-b±\sqrt{b^{2}-4ac}}{2a} 1 ni a, 0 ni b va -2 ni c bilan almashtiring.
x=\frac{0±\sqrt{-4\left(-2\right)}}{2}
0 kvadratini chiqarish.
x=\frac{0±\sqrt{8}}{2}
-4 ni -2 marotabaga ko'paytirish.
x=\frac{0±2\sqrt{2}}{2}
8 ning kvadrat ildizini chiqarish.
x=\sqrt{2}
x=\frac{0±2\sqrt{2}}{2} tenglamasini yeching, bunda ± musbat.
x=-\sqrt{2}
x=\frac{0±2\sqrt{2}}{2} tenglamasini yeching, bunda ± manfiy.
x=\sqrt{2} x=-\sqrt{2}
Tenglama yechildi.
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