2 times the square of x = - 1, then what is x equal to

2 times the square of x = - 1, then what is x equal to


It is reduced to 2x ^ 2 + 6x-5 = 0
Using the formula method △ = 36 + 40 = 76
x1=（-6+√76）/4=（-3+√19）/2
x2=(-6-√76)/4=(-3-√19)/2



If X-1 / x = 2, then the square of X + the square of 1 / X=


Square both sides of X-1 / x = 2
Square of X + square of 1 / X - 2x * 1 / x = 4
Then the square of X + 1 / x = 4 + 2 = 6



2 / 5 of x equals 1 / 2 of Y, X: y =?


4：5

Elden Ring Premiere

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