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受欢迎的代数 >

33^2=30.6^2+v^2

解答

3 3^{2} = 30. 6^{2} + v^{2}

解答

v = \frac{6 106}{5}, v = - \frac{6 106}{5}

+1

十进制

v = 12.35475 \dots, v = - 12.35475 \dots

求解步骤

3 3^{2} = 30. 6^{2} + v^{2}

交换两边

30. 6^{2} + v^{2} = 3 3^{2}

将

30. 6^{2}

到右边

v^{2} = 152.64

对于

x^{2} = f (a)

解为

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

v = 152.64, v = - 152.64

152.64 = \frac{6 106}{5}

- 152.64 = - \frac{6 106}{5}

v = \frac{6 106}{5}, v = - \frac{6 106}{5}

作图

流行的例子

solvefor t,0-75=15.5*t+1/2*(-9.8)*t^2

so l v e f or t, 0 - 75 = 15.5 \cdot t + \frac{1}{2} \cdot (- 9.8) \cdot t^{2}

x^2-2x+2=0,x^2-2x+4=0

x^{2} - 2 x + 2 = 0, x^{2} - 2 x + 4 = 0

completesquare 2.1x^2-6.1x+3900=4000000

co m pl e t es q u a re 2.1 x^{2} - 6.1 x + 3900 = 4000000

x^{2} = 36 - 9 x

1 8^{2} + b^{2} = 3 6^{2}