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受欢迎的代数 >

2x^2=15

解答

2 x^{2} = 15

解答

x = \frac{15}{2}, x = - \frac{15}{2}

+1

十进制

x = 2.73861 \dots, x = - 2.73861 \dots

求解步骤

2 x^{2} = 15

两边除以

2

x^{2} = \frac{15}{2}

对于

x^{2} = f (a)

解为

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

x = \frac{15}{2}, x = - \frac{15}{2}

作图

流行的例子

2 x^{2} = 49

7 x^{2} + 3 x - 3 = 0

solvefor x,x^2-6xy+y^2=6

so l v e f or x, x^{2} - 6 x y + y^{2} = 6

solvefor a,an=2n^2-n

so l v e f or a, an = 2 n^{2} - n

solvefor y,y^2=x(x-4)^2

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