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受欢迎的代数 >

9x^2-25=d

解答

9 x^{2} - 25 = d

解答

x = \frac{d + 25}{3}, x = - \frac{d + 25}{3}

求解步骤

9 x^{2} - 25 = d

将

25

到右边

9 x^{2} = d + 25

两边除以

9

x^{2} = \frac{d + 25}{9}

对于

x^{2} = f (a)

解为

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

x = \frac{d + 25}{9}, x = - \frac{d + 25}{9}

化简

\frac{d + 25}{9} : \frac{d + 25}{3}

化简

- \frac{d + 25}{9} : - \frac{d + 25}{3}

x = \frac{d + 25}{3}, x = - \frac{d + 25}{3}

作图

流行的例子

solvefor x,12x^2-15xy=0

so l v e f or x, 12 x^{2} - 15 x y = 0

solvefor x,4x^2+2y^2=4xy+2xy-1

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

15 x^{2} - 28 = x

solvefor x,-8x^2+18y^2+18z^2=2

so l v e f or x, - 8 x^{2} + 18 y^{2} + 18 z^{2} = 2

solvefor t,h= 1/2*a_{g(t)}*t^2

so l v e f or t, h = \frac{1}{2} \cdot a_{g (t)} \cdot t^{2}