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受欢迎的代数 >

solvefor a,(a+5)(a+b)=a^2+2a+c

解答

求解

a, (a + 5) (a + b) = a^{2} + 2 a + c

解答

a = \frac{c - 5 b}{b + 3}; b \neq = - 3

求解步骤

(a + 5) (a + b) = a^{2} + 2 a + c

展开

(a + 5) (a + b) : a^{2} + ab + 5 a + 5 b

a^{2} + ab + 5 a + 5 b = a^{2} + 2 a + c

将

5 b

到右边

a^{2} + ab + 5 a = a^{2} + 2 a + c - 5 b

两边减去

a^{2} + 2 a

a^{2} + ab + 5 a - (a^{2} + 2 a) = a^{2} + 2 a + c - 5 b - (a^{2} + 2 a)

化简

ab + 3 a = c - 5 b

分解

ab + 3 a : a (b + 3)

a (b + 3) = c - 5 b

两边除以

b + 3; b \neq = - 3

a = \frac{c - 5 b}{b + 3}; b \neq = - 3

作图

流行的例子

2 x - 2 = 7 x + 8

solvefor w,48=lwh

so l v e f or w, 48 = lw h

4 x + 5 x = 27

solvefor b,a=(a+b+c)/3

so l v e f or b, a = \frac{a + b + c}{3}

solvefor x,(ax)/b+(cx)/d =e

so l v e f or x, \frac{a x}{b} + \frac{c x}{d} = e