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受欢迎的代数 >

4b^2+16b-19=-10

解答

4 b^{2} + 16 b - 19 = - 10

解答

b = \frac{1}{2}, b = - \frac{9}{2}

+1

十进制

b = 0.5, b = - 4.5

求解步骤

4 b^{2} + 16 b - 19 = - 10

将

10

para o lado esquerdo

4 b^{2} + 16 b - 9 = 0

使用求根公式求解

b_{1, 2} = \frac{- 16 \pm 1 6 ^{2} - 4 \cdot 4 ( - 9 )}{2 \cdot 4}

1 6^{2} - 4 \cdot 4 (- 9) = 20

b_{1, 2} = \frac{- 16 \pm 20}{2 \cdot 4}

将解分隔开

b_{1} = \frac{- 16 + 20}{2 \cdot 4}, b_{2} = \frac{- 16 - 20}{2 \cdot 4}

b = \frac{- 16 + 20}{2 \cdot 4} : \frac{1}{2}

b = \frac{- 16 - 20}{2 \cdot 4} : - \frac{9}{2}

二次方程组的解是:

b = \frac{1}{2}, b = - \frac{9}{2}

作图

流行的例子

(x - 2) \cdot (x - 1) = 0

1/2 x^2+5x-12=0

\frac{1}{2} x^{2} + 5 x - 12 = 0

(x+1)(3x-5)=(5x-3)*4

(x + 1) (3 x - 5) = (5 x - 3) \cdot 4

solvefor r,z=r^2

so l v e f or r, z = r^{2}

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