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受欢迎的代数 >

20x^2-45=0

解答

20 x^{2} - 45 = 0

解答

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

+1

十进制

x = 1.5, x = - 1.5

求解步骤

20 x^{2} - 45 = 0

将

45

到右边

20 x^{2} = 45

两边除以

20

x^{2} = \frac{9}{4}

对于

x^{2} = f (a)

解为

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

x = \frac{9}{4}, x = - \frac{9}{4}

\frac{9}{4} = \frac{3}{2}

- \frac{9}{4} = - \frac{3}{2}

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

作图

流行的例子

5x^2+6x+5=2(2x^2+10)-4x

5 x^{2} + 6 x + 5 = 2 (2 x^{2} + 10) - 4 x

0=19.23x+3.25x^2

0 = 19.23 x + 3.25 x^{2}

化简-(8/7)/((-10/9))

s im pl i f y - \frac{\frac{8}{7}}{( - \frac{10}{9} )}

x^{2} < x + 6

m^{2} - 6 m + 8 > 0