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受欢迎的代数 >

20^2+2*32.2=v^2+50(sqrt(5)-2)^2

解答

2 0^{2} + 2 \cdot 32.2 = v^{2} + 50 (5 - 2)^{2}

解答

v = 2005 + 14.4, v = - 2005 + 14.4

+1

十进制

v = 21.48519 \dots, v = - 21.48519 \dots

求解步骤

2 0^{2} + 2 \cdot 32.2 = v^{2} + 50 (5 - 2)^{2}

交换两边

v^{2} + 50 (5 - 2)^{2} = 2 0^{2} + 2 \cdot 32.2

将

50 (5 - 2)^{2}

到右边

v^{2} = 400 + 64.4 - 50 (5 - 2)^{2}

化简

400 + 64.4 - 50 (5 - 2)^{2} : 2005 + 14.4

对于

x^{2} = f (a)

解为

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

v = 2005 + 14.4, v = - 2005 + 14.4

作图

流行的例子

solvefor x,3.1396(1-x^2)=(pi)(x)^2

so l v e f or x, 3.1396 (1 - x^{2}) = (π) (x)^{2}

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- t^{2} + 27 t + 3 = - 2 t^{2} + 25 t + 27

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-16t^2+116t+101=0

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