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受欢迎的代数 >

3c^2-18c+24=((-2)-(2))/((4)-(2))

解答

3 c^{2} - 18 c + 24 = \frac{( - 2 ) - ( 2 )}{( 4 ) - ( 2 )}

解答

c = \frac{9 + 3}{3}, c = \frac{9 - 3}{3}

+1

十进制

c = 3.57735 \dots, c = 2.42264 \dots

求解步骤

3 c^{2} - 18 c + 24 = \frac{( - 2 ) - ( 2 )}{( 4 ) - ( 2 )}

化简

(4) - (2) : 2

3 c^{2} - 18 c + 24 = \frac{( - 2 ) - ( 2 )}{2}

在两边乘以

2

6 c^{2} - 36 c + 48 = - 4

将

4

para o lado esquerdo

6 c^{2} - 36 c + 52 = 0

使用求根公式求解

c_{1, 2} = \frac{- ( - 36 ) \pm ( - 36 ) ^{2} - 4 \cdot 6 \cdot 52}{2 \cdot 6}

(- 36)^{2} - 4 \cdot 6 \cdot 52 = 43

c_{1, 2} = \frac{- ( - 36 ) \pm 4 3}{2 \cdot 6}

将解分隔开

c_{1} = \frac{- ( - 36 ) + 4 3}{2 \cdot 6}, c_{2} = \frac{- ( - 36 ) - 4 3}{2 \cdot 6}

c = \frac{- ( - 36 ) + 4 3}{2 \cdot 6} : \frac{9 + 3}{3}

c = \frac{- ( - 36 ) - 4 3}{2 \cdot 6} : \frac{9 - 3}{3}

二次方程组的解是:

c = \frac{9 + 3}{3}, c = \frac{9 - 3}{3}

作图

流行的例子

x^{2} + x - 34 = 0

m^{2} + 6 m + 1 = 0

t^{2} + 8 t + 1 = 0

x^{2} - 2 x + 81 = 0

quadraticformula 3x^2-5x-1=0

q u a d r a t i c f or m u l a 3 x^{2} - 5 x - 1 = 0