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受欢迎的代数 >

5x^2=400

解答

5 x^{2} = 400

解答

x = 45, x = - 45

+1

十进制

x = 8.94427 \dots, x = - 8.94427 \dots

求解步骤

5 x^{2} = 400

两边除以

5

x^{2} = 80

对于

x^{2} = f (a)

解为

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

x = 80, x = - 80

80 = 45

- 80 = - 45

x = 45, x = - 45

作图

流行的例子

13 - 14 z = 0

因式分解 (x^2-y^2)-[(x+y)(x-y)]+3x^2

f a c t or (x^{2} - y^{2}) - [(x + y) (x - y)] + 3 x^{2}

化简 5/9+4/18

s im pl i f y \frac{5}{9} + \frac{4}{18}

因式分解 2k^2-13k-24

f a c t or 2 k^{2} - 13 k - 24

x^{2} = \frac{5}{16}