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受欢迎的代数 >

(3x+2)(4x-5)=0

解答

(3 x + 2) (4 x - 5) = 0

解答

x = - \frac{2}{3}, x = \frac{5}{4}

+1

十进制

x = - 0.66666 \dots, x = 1.25

求解步骤

(3 x + 2) (4 x - 5) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

3 x + 2 = 0 or 4 x - 5 = 0

解

3 x + 2 = 0 : x = - \frac{2}{3}

解

4 x - 5 = 0 : x = \frac{5}{4}

二次方程组的解是:

x = - \frac{2}{3}, x = \frac{5}{4}

作图

流行的例子

3(x-1)(x+2)=3x-6

3 (x - 1) (x + 2) = 3 x - 6

x^2-0.5625x^2+2x^2-2x-3+5(2x)=0

x^{2} - 0.5625 x^{2} + 2 x^{2} - 2 x - 3 + 5 (2 x) = 0

(x^2)/(12)-x/6 =1

\frac{x ^{2}}{12} - \frac{x}{6} = 1

9 k^{2} + 18 k - 40 = 0

- 4 = - 7 k^{2}