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受欢迎的代数 >

a^2-28a-480=0

解答

a^{2} - 28 a - 480 = 0

解答

a = 40, a = - 12

求解步骤

a^{2} - 28 a - 480 = 0

使用求根公式求解

a_{1, 2} = \frac{- ( - 28 ) \pm ( - 28 ) ^{2} - 4 \cdot 1 \cdot ( - 480 )}{2 \cdot 1}

(- 28)^{2} - 4 \cdot 1 \cdot (- 480) = 52

a_{1, 2} = \frac{- ( - 28 ) \pm 52}{2 \cdot 1}

将解分隔开

a_{1} = \frac{- ( - 28 ) + 52}{2 \cdot 1}, a_{2} = \frac{- ( - 28 ) - 52}{2 \cdot 1}

a = \frac{- ( - 28 ) + 52}{2 \cdot 1} : 40

a = \frac{- ( - 28 ) - 52}{2 \cdot 1} : - 12

二次方程组的解是:

a = 40, a = - 12

作图

流行的例子

\frac{2}{3} x^{2} - 16 = 32

solvefor x,x^2+y^2-6x+10y+34=0

so l v e f or x, x^{2} + y^{2} - 6 x + 10 y + 34 = 0

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