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受欢迎的代数 >

solvefor x,16x-40x^{1/2}+9=0

解答

x, 16 x - 40 x^{\frac{1}{2}} + 9 = 0

解答

x = \frac{81}{16}, x = \frac{1}{16}

+1

十进制

x = 5.0625, x = 0.0625

求解步骤

16 x - 40 x^{\frac{1}{2}} + 9 = 0

去除平方根

1600 x = 256 x^{2} + 288 x + 81

解

1600 x = 256 x^{2} + 288 x + 81 : x = \frac{81}{16}, x = \frac{1}{16}

x = \frac{81}{16}, x = \frac{1}{16}

验证解:

x = \frac{81}{16}

真

, x = \frac{1}{16}

真

解为

x = \frac{81}{16}, x = \frac{1}{16}

作图

流行的例子

solvefor a,(2-j3)=sqrt(a+jb)

so l v e f or a, (2 - j 3) = a + jb

sqrt(x+9)+sqrt(x)=9

x + 9 + x = 9

sqrt(2x+1)+2=sqrt(4x+9)

2 x + 1 + 2 = 4 x + 9

3 = x - 1

sqrt(2x-1)-sqrt(x+3)+1=0

2 x - 1 - x + 3 + 1 = 0