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受欢迎的代数 >

32^2+x^2=(80-x)^2+40^2

解答

3 2^{2} + x^{2} = (80 - x)^{2} + 4 0^{2}

解答

x = \frac{218}{5}

+1

十进制

x = 43.6

求解步骤

3 2^{2} + x^{2} = (80 - x)^{2} + 4 0^{2}

3 2^{2} = 1024

1024 + x^{2} = (80 - x)^{2} + 4 0^{2}

4 0^{2} = 1600

1024 + x^{2} = (80 - x)^{2} + 1600

展开

(80 - x)^{2} + 1600 : x^{2} - 160 x + 8000

1024 + x^{2} = x^{2} - 160 x + 8000

将

1024

到右边

x^{2} = x^{2} - 160 x + 6976

两边减去

x^{2} - 160 x

x^{2} - (x^{2} - 160 x) = x^{2} - 160 x + 6976 - (x^{2} - 160 x)

化简

160 x = 6976

两边除以

160

x = \frac{218}{5}

作图

流行的例子

- \frac{2}{5} = \frac{x}{20}

0 - 8 = - 4 x

solvefor a,y=ax-b

so l v e f or a, y = a x - b

solvefor n,15m+12n=-5

so l v e f or n, 15 m + 12 n = - 5

solvefor x,4x+4y=0

so l v e f or x, 4 x + 4 y = 0