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受欢迎的代数 >

7(((2x-8)^2)/9)=63

解答

7 (\frac{( 2 x - 8 ) ^{2}}{9}) = 63

解答

x = \frac{17}{2}, x = - \frac{1}{2}

+1

十进制

x = 8.5, x = - 0.5

求解步骤

7 (\frac{( 2 x - 8 ) ^{2}}{9}) = 63

两边除以

7

\frac{( 2 x - 8 ) ^{2}}{9} = 9

在两边乘以

9

(2 x - 8)^{2} = 81

对于

(g (x))^{2} = f (a)

解为

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

解

2 x - 8 = 81 : x = \frac{17}{2}

解

2 x - 8 = - 81 : x = - \frac{1}{2}

二次方程组的解是:

x = \frac{17}{2}, x = - \frac{1}{2}

作图

流行的例子

4 (x + 4)^{2} - 36 = 28

solvefor r,V= 1/3 (pir^2)h

so l v e f or r, V = \frac{1}{3} (π r^{2}) h

4 x^{2} - 19 = - 4 x

3 x^{2} - 3 = 1

17 - 2 x^{2} = - 21