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受欢迎的代数 >

(4a)/9 a=5

解答

\frac{4 a}{9} a = 5

解答

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

+1

十进制

a = 3.35410 \dots, a = - 3.35410 \dots

求解步骤

\frac{4 a}{9} a = 5

化简

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

在两边乘以

9

\frac{9 \cdot 4 a ^{2}}{9} = 5 \cdot 9

4 a^{2} = 45

两边除以

4

\frac{4 a ^{2}}{4} = \frac{45}{4}

a^{2} = \frac{45}{4}

对于

x^{2} = f (a)

解为

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

a = \frac{45}{4}, a = - \frac{45}{4}

\frac{45}{4} = \frac{3 5}{2}

- \frac{45}{4} = - \frac{3 5}{2}

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

作图

流行的例子

3 x^{2} - x - 2 = 1

1 x^{2} - 2 x - 15 = 0

(x-2)^2=(2x+3)^2

(x - 2)^{2} = (2 x + 3)^{2}

4 x^{2} + 6 x - 18 = 0

(w+6)(2w+6)=216

(w + 6) (2 w + 6) = 216