x^2=91

פתרון

x^{2} = 91

x = 91, x = - 91

צעדי פתרון

x^{2} = 91

x = f (a), - f (a)

הפתרונות הם

x^{2} = f (a)

עבור

x = 91, x = - 91

x^{2} = 85

4 x - x^{2} = 1

3 x^{2} + 10 x - 4 = 0

- x^{2} - x + 42 = 0

(x - 3)^{2} - 2 (x - 3) + 1 = 0