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受欢迎的代数 >

v^2-5v-24=0

解答

v^{2} - 5 v - 24 = 0

解答

v = 8, v = - 3

求解步骤

v^{2} - 5 v - 24 = 0

使用求根公式求解

v_{1, 2} = \frac{- ( - 5 ) \pm ( - 5 ) ^{2} - 4 \cdot 1 \cdot ( - 24 )}{2 \cdot 1}

(- 5)^{2} - 4 \cdot 1 \cdot (- 24) = 11

v_{1, 2} = \frac{- ( - 5 ) \pm 11}{2 \cdot 1}

将解分隔开

v_{1} = \frac{- ( - 5 ) + 11}{2 \cdot 1}, v_{2} = \frac{- ( - 5 ) - 11}{2 \cdot 1}

v = \frac{- ( - 5 ) + 11}{2 \cdot 1} : 8

v = \frac{- ( - 5 ) - 11}{2 \cdot 1} : - 3

二次方程组的解是:

v = 8, v = - 3

作图

流行的例子

solvefor x,5y^3=x^2

so l v e f or x, 5 y^{3} = x^{2}

y^{2} - y - 56 = 0

3 a^{2} - 17 = 31

2 x^{2} - 14 x + 49 = 0

completesquare x^2+14x+36=0

co m pl e t es q u a re x^{2} + 14 x + 36 = 0