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受欢迎的代数 >

2x^2+7x-13=-10

解答

2 x^{2} + 7 x - 13 = - 10

解答

x = \frac{- 7 + 73}{4}, x = \frac{- 7 - 73}{4}

+1

十进制

x = 0.38600 \dots, x = - 3.88600 \dots

求解步骤

2 x^{2} + 7 x - 13 = - 10

将

10

para o lado esquerdo

2 x^{2} + 7 x - 3 = 0

使用求根公式求解

x_{1, 2} = \frac{- 7 \pm 7 ^{2} - 4 \cdot 2 ( - 3 )}{2 \cdot 2}

7^{2} - 4 \cdot 2 (- 3) = 73

x_{1, 2} = \frac{- 7 \pm 73}{2 \cdot 2}

将解分隔开

x_{1} = \frac{- 7 + 73}{2 \cdot 2}, x_{2} = \frac{- 7 - 73}{2 \cdot 2}

x = \frac{- 7 + 73}{2 \cdot 2} : \frac{- 7 + 73}{4}

x = \frac{- 7 - 73}{2 \cdot 2} : \frac{- 7 - 73}{4}

二次方程组的解是:

x = \frac{- 7 + 73}{4}, x = \frac{- 7 - 73}{4}

作图

流行的例子

24 = 4 + 37 t - 16 t^{2}

solvefor x,4x^2y+2y^3=1+6xy^2

so l v e f or x, 4 x^{2} y + 2 y^{3} = 1 + 6 x y^{2}

k^{2} + k = 0

solvefor x,(x-2)^2+(y+4)^2=0

so l v e f or x, (x - 2)^{2} + (y + 4)^{2} = 0

27 = x^{2}