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受欢迎的代数 >

5n^2+8=4

解答

5 n^{2} + 8 = 4

解答

n = \frac{2}{5} i, n = - \frac{2}{5} i

求解步骤

5 n^{2} + 8 = 4

将

8

到右边

5 n^{2} = - 4

两边除以

5

n^{2} = - \frac{4}{5}

对于

x^{2} = f (a)

解为

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

n = - \frac{4}{5}, n = - - \frac{4}{5}

- \frac{4}{5} = \frac{2}{5} i

- - \frac{4}{5} = - \frac{2}{5} i

n = \frac{2}{5} i, n = - \frac{2}{5} i

作图

流行的例子

x^2+0.47x-0.752=0

x^{2} + 0.47 x - 0.752 = 0

quadraticformula 6x^2+5x-4=0

q u a d r a t i c f or m u l a 6 x^{2} + 5 x - 4 = 0

x (x - 3) + 1 = 0

solvefor x,f(x+3)=4x^2+3x-4

so l v e f or x, f (x + 3) = 4 x^{2} + 3 x - 4

solvefor x,1-4x+2x^2-2y^3=0

so l v e f or x, 1 - 4 x + 2 x^{2} - 2 y^{3} = 0