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受欢迎的代数 >

c^2-7c+12=0

解答

c^{2} - 7 c + 12 = 0

解答

c = 4, c = 3

求解步骤

c^{2} - 7 c + 12 = 0

使用求根公式求解

c_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 1 \cdot 12}{2 \cdot 1}

(- 7)^{2} - 4 \cdot 1 \cdot 12 = 1

c_{1, 2} = \frac{- ( - 7 ) \pm 1}{2 \cdot 1}

将解分隔开

c_{1} = \frac{- ( - 7 ) + 1}{2 \cdot 1}, c_{2} = \frac{- ( - 7 ) - 1}{2 \cdot 1}

c = \frac{- ( - 7 ) + 1}{2 \cdot 1} : 4

c = \frac{- ( - 7 ) - 1}{2 \cdot 1} : 3

二次方程组的解是:

c = 4, c = 3

作图

流行的例子

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