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受欢迎的代数 >

7p^2=p^2-4p

解答

7 p^{2} = p^{2} - 4 p

解答

p = - \frac{2}{3}, p = 0

+1

十进制

p = - 0.66666 \dots, p = 0

求解步骤

7 p^{2} = p^{2} - 4 p

交换两边

p^{2} - 4 p = 7 p^{2}

将

7 p^{2}

para o lado esquerdo

- 6 p^{2} - 4 p = 0

使用求根公式求解

p_{1, 2} = \frac{- ( - 4 ) \pm ( - 4 ) ^{2} - 4 ( - 6 ) \cdot 0}{2 ( - 6 )}

(- 4)^{2} - 4 (- 6) \cdot 0 = 4

p_{1, 2} = \frac{- ( - 4 ) \pm 4}{2 ( - 6 )}

将解分隔开

p_{1} = \frac{- ( - 4 ) + 4}{2 ( - 6 )}, p_{2} = \frac{- ( - 4 ) - 4}{2 ( - 6 )}

p = \frac{- ( - 4 ) + 4}{2 ( - 6 )} : - \frac{2}{3}

p = \frac{- ( - 4 ) - 4}{2 ( - 6 )} : 0

二次方程组的解是:

p = - \frac{2}{3}, p = 0

作图

流行的例子

solvefor x,x^2+y^2+2=0

so l v e f or x, x^{2} + y^{2} + 2 = 0

9 (9 - 9 x^{2}) = 9

2 4^{2} + b^{2} = 4 0^{2}

2 x = 4 x^{2} - 1

4/9 a^2-1/4 a=5

\frac{4}{9} a^{2} - \frac{1}{4} a = 5