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受欢迎的代数 >

4(5x-7)^2-40=-32

解答

4 (5 x - 7)^{2} - 40 = - 32

解答

x = \frac{2 + 7}{5}, x = \frac{- 2 + 7}{5}

+1

十进制

x = 1.68284 \dots, x = 1.11715 \dots

求解步骤

4 (5 x - 7)^{2} - 40 = - 32

将

40

到右边

4 (5 x - 7)^{2} = 8

两边除以

4

(5 x - 7)^{2} = 2

对于

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

解为

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

解

5 x - 7 = 2 : x = \frac{2 + 7}{5}

解

5 x - 7 = - 2 : x = \frac{- 2 + 7}{5}

二次方程组的解是:

x = \frac{2 + 7}{5}, x = \frac{- 2 + 7}{5}

作图

流行的例子

3(2x+5)^2+23=38

3 (2 x + 5)^{2} + 23 = 38

solvefor y,x^2y^2+xy=6

so l v e f or y, x^{2} y^{2} + x y = 6

6q^2+10q+25=5q^2

6 q^{2} + 10 q + 25 = 5 q^{2}

2 W^{2} + W - 45 = 0

3 x^{2} + 5 x = 1428