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受欢迎的代数 >

(x+6)(x+3)=x(x+8)

解答

(x + 6) (x + 3) = x (x + 8)

解答

x = - 18

求解步骤

(x + 6) (x + 3) = x (x + 8)

展开

(x + 6) (x + 3) : x^{2} + 9 x + 18

展开

x (x + 8) : x^{2} + 8 x

x^{2} + 9 x + 18 = x^{2} + 8 x

将

18

到右边

x^{2} + 9 x = x^{2} + 8 x - 18

两边减去

x^{2} + 8 x

x^{2} + 9 x - (x^{2} + 8 x) = x^{2} + 8 x - 18 - (x^{2} + 8 x)

化简

x = - 18

作图

流行的例子

solvefor b,c=y+b

so l v e f or b, c = y + b

x/3-2= 2/5 x+1/4

\frac{x}{3} - 2 = \frac{2}{5} x + \frac{1}{4}

f = (\frac{1}{2})^{- 3}

solvefor b,4y-12b=3c+2y

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