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受欢迎的代数 >

6(x+3)-7sqrt(x+3)-3=0

解答

6 (x + 3) - 7 x + 3 - 3 = 0

解答

x = - \frac{3}{4}

+1

十进制

x = - 0.75

求解步骤

6 (x + 3) - 7 x + 3 - 3 = 0

展开

6 (x + 3) - 7 x + 3 - 3 : 6 x + 15 - 7 x + 3

6 x + 15 - 7 x + 3 = 0

去除平方根

49 x + 147 = 36 x^{2} + 180 x + 225

解

49 x + 147 = 36 x^{2} + 180 x + 225 : x = - \frac{3}{4}, x = - \frac{26}{9}

x = - \frac{3}{4}, x = - \frac{26}{9}

验证解:

x = - \frac{3}{4}

真

, x = - \frac{26}{9}

假

解是

x = - \frac{3}{4}

作图

流行的例子

sqrt(2x+9)-sqrt(2x-7)=2

2 x + 9 - 2 x - 7 = 2

sqrt(2x-1)=\sqrt[4]{3x-2}

2 x - 1 = 4 3 x - 2

600 = x^{\frac{2}{3}}

v = 6 v - 8

x - 1 - x = - 5