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受欢迎的代数 >

sqrt(5x+79)=3x+17

解答

5 x + 79 = 3 x + 17

解答

x = - 3

求解步骤

5 x + 79 = 3 x + 17

两边进行平方:

5 x + 79 = 9 x^{2} + 102 x + 289

5 x + 79 = 9 x^{2} + 102 x + 289

解

5 x + 79 = 9 x^{2} + 102 x + 289 : x = - 3, x = - \frac{70}{9}

x = - 3, x = - \frac{70}{9}

验证解:

x = - 3

真

, x = - \frac{70}{9}

假

解是

x = - 3

作图

流行的例子

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25.7 = (18.7)^{2} + x^{2}

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x^{2} - x - 4 = x + 2

(x)=x^{(1/3)}(x+4)

(x) = x^{(\frac{1}{3})} (x + 4)

(5z-1)^{1/4}-4=-2

(5 z - 1)^{\frac{1}{4}} - 4 = - 2