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受欢迎的代数 >

9u^2-30u+25=0

解答

9 u^{2} - 30 u + 25 = 0

解答

u = \frac{5}{3}

+1

十进制

u = 1.66666 \dots

求解步骤

9 u^{2} - 30 u + 25 = 0

使用求根公式求解

u_{1, 2} = \frac{- ( - 30 ) \pm ( - 30 ) ^{2} - 4 \cdot 9 \cdot 25}{2 \cdot 9}

(- 30)^{2} - 4 \cdot 9 \cdot 25 = 0

u_{1, 2} = \frac{- ( - 30 ) \pm 0}{2 \cdot 9}

u = \frac{- ( - 30 )}{2 \cdot 9}

\frac{- ( - 30 )}{2 \cdot 9} = \frac{5}{3}

u = \frac{5}{3}

二次方程组的解是:

u = \frac{5}{3}

作图

流行的例子

x/2 =(x^2)/(25)

\frac{x}{2} = \frac{x ^{2}}{25}

(0.00000064-x)(0.00000114-x)=4.1E-13

(0.00000064 - x) (0.00000114 - x) = 4.1 E - 13

18p^2-164p+285=-3-8p

18 p^{2} - 164 p + 285 = - 3 - 8 p

10 m^{2} - 2 m = 7

3 (x + 4)^{2} - 5 = 55