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受欢迎的代数 >

9(9-9x^2)=9

解答

9 (9 - 9 x^{2}) = 9

解答

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

+1

十进制

x = 0.94280 \dots, x = - 0.94280 \dots

求解步骤

9 (9 - 9 x^{2}) = 9

两边除以

9

9 - 9 x^{2} = 1

将

9

到右边

- 9 x^{2} = - 8

两边除以

- 9

x^{2} = \frac{8}{9}

对于

x^{2} = f (a)

解为

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

x = \frac{8}{9}, x = - \frac{8}{9}

\frac{8}{9} = \frac{2 2}{3}

- \frac{8}{9} = - \frac{2 2}{3}

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

作图

流行的例子

2 4^{2} + b^{2} = 4 0^{2}

2 x = 4 x^{2} - 1

4/9 a^2-1/4 a=5

\frac{4}{9} a^{2} - \frac{1}{4} a = 5

(5 + y)^{2} + y^{2} = 37

completesquare x^2+6x=-5

co m pl e t es q u a re x^{2} + 6 x = - 5