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受欢迎的代数 >

3+5(x-2)(x+1)=4x^2+(x-2)x-10

解答

3 + 5 (x - 2) (x + 1) = 4 x^{2} + (x - 2) x - 10

解答

x = 1

求解步骤

3 + 5 (x - 2) (x + 1) = 4 x^{2} + (x - 2) x - 10

展开

3 + 5 (x - 2) (x + 1) : 5 x^{2} - 5 x - 7

展开

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

5 x^{2} - 5 x - 7 = 5 x^{2} - 2 x - 10

将

7

到右边

5 x^{2} - 5 x = 5 x^{2} - 2 x - 3

两边减去

5 x^{2} - 2 x

5 x^{2} - 5 x - (5 x^{2} - 2 x) = 5 x^{2} - 2 x - 3 - (5 x^{2} - 2 x)

化简

- 3 x = - 3

两边除以

- 3

x = 1

作图

流行的例子

solvefor x,-2x-3y=13

so l v e f or x, - 2 x - 3 y = 13

3 x - 2 = 6 + 5 x

solvefor H,U=H-pV

so l v e f or H, U = H - p V

- 3 x + 8 = 0

\frac{3}{2} - \frac{7}{4} v = - \frac{9}{8}