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受欢迎的代数 >

1.2h^2-0.6h-10.2=0

解答

1.2 h^{2} - 0.6 h - 10.2 = 0

解答

h = \frac{1 + 137}{4}, h = \frac{1 - 137}{4}

+1

十进制

h = 3.17617 \dots, h = - 2.67617 \dots

求解步骤

1.2 h^{2} - 0.6 h - 10.2 = 0

在两边乘以

10

12 h^{2} - 6 h - 102 = 0

使用求根公式求解

h_{1, 2} = \frac{- ( - 6 ) \pm ( - 6 ) ^{2} - 4 \cdot 12 ( - 102 )}{2 \cdot 12}

(- 6)^{2} - 4 \cdot 12 (- 102) = 6137

h_{1, 2} = \frac{- ( - 6 ) \pm 6 137}{2 \cdot 12}

将解分隔开

h_{1} = \frac{- ( - 6 ) + 6 137}{2 \cdot 12}, h_{2} = \frac{- ( - 6 ) - 6 137}{2 \cdot 12}

h = \frac{- ( - 6 ) + 6 137}{2 \cdot 12} : \frac{1 + 137}{4}

h = \frac{- ( - 6 ) - 6 137}{2 \cdot 12} : \frac{1 - 137}{4}

二次方程组的解是:

h = \frac{1 + 137}{4}, h = \frac{1 - 137}{4}

作图

流行的例子

3 = 3 x^{2} + 8 x

1 x^{2} + 1 x - 2 = 0

0 = (x - 3)^{2} - 1

2 (x - 2)^{2} + 3 = 0

quadraticformula x^2+2x-8=0

q u a d r a t i c f or m u l a x^{2} + 2 x - 8 = 0