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受欢迎的代数 >

7x^3=5x^2

解答

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

解答

x = 0, x = \frac{5}{7}

+1

十进制

x = 0, x = 0.71428 \dots

求解步骤

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

将

5 x^{2}

para o lado esquerdo

7 x^{3} - 5 x^{2} = 0

因式分解

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

x^{2} (7 x - 5) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

x = 0 or 7 x - 5 = 0

解

7 x - 5 = 0 : x = \frac{5}{7}

解为

x = 0, x = \frac{5}{7}

作图

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