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受欢迎的代数 >

10x^2-19=5

解答

10 x^{2} - 19 = 5

解答

x = \frac{2 3}{5}, x = - \frac{2 3}{5}

+1

十进制

x = 1.54919 \dots, x = - 1.54919 \dots

求解步骤

10 x^{2} - 19 = 5

将

19

到右边

10 x^{2} = 24

两边除以

10

x^{2} = \frac{12}{5}

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

x = \frac{12}{5}, x = - \frac{12}{5}

\frac{12}{5} = \frac{2 3}{5}

- \frac{12}{5} = - \frac{2 3}{5}

x = \frac{2 3}{5}, x = - \frac{2 3}{5}

作图

流行的例子

4 x + 6 + x = 5 + 9 x + 9

(x+6)(1-x)(x-4)<0

(x + 6) (1 - x) (x - 4) < 0

5 x^{2} + 7 = 36 x

x^{3} - 1 \geq 0

因式分解 x^4+17x^2+60

f a c t or x^{4} + 17 x^{2} + 60