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受欢迎的代数 >

solvefor a,(sqrt(a)+sqrt(8a))^2=54+bsqrt(2)

解答

求解

a, (a + 8 a)^{2} = 54 + b 2

解答

a = \frac{486 + 9 2 b - 216 2 - 8 b}{49}

求解步骤

(a + 8 a)^{2} = 54 + b 2

化简

(a + 8 a)^{2} : (a + 22 a)^{2}

(a + 22 a)^{2} = 54 + b 2

展开

(a + 22 a)^{2} : 9 a + 42 a

9 a + 42 a = 54 + b 2

分解

9 a + 42 a : (9 + 42) a

(9 + 42) a = 54 + b 2

两边除以

9 + 42

a = \frac{( 9 - 4 2 ) ( 54 + 2 b )}{49}

化简

\frac{( 9 - 4 2 ) ( 54 + 2 b )}{49} : \frac{486 + 9 2 b - 216 2 - 8 b}{49}

a = \frac{486 + 9 2 b - 216 2 - 8 b}{49}

作图

流行的例子

- 7 f + 6 = 116 + 3 f

x+4-(x-2)(x-1)=3(3-x)-x^2

x + 4 - (x - 2) (x - 1) = 3 (3 - x) - x^{2}

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so l v e f or y, 2 x y + 6 y = 10

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