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人気のある代数 >

a^2+5a+4=0

解

a^{2} + 5 a + 4 = 0

解

a = - 1, a = - 4

解答ステップ

a^{2} + 5 a + 4 = 0

解くとthe二次式

a_{1, 2} = \frac{- 5 \pm 5 ^{2} - 4 \cdot 1 \cdot 4}{2 \cdot 1}

5^{2} - 4 \cdot 1 \cdot 4 = 3

a_{1, 2} = \frac{- 5 \pm 3}{2 \cdot 1}

解を分離する

a_{1} = \frac{- 5 + 3}{2 \cdot 1}, a_{2} = \frac{- 5 - 3}{2 \cdot 1}

a = \frac{- 5 + 3}{2 \cdot 1} : - 1

a = \frac{- 5 - 3}{2 \cdot 1} : - 4

二次equationの解:

a = - 1, a = - 4

グラフ

人気の例

solvefor x,x^2+x-p(p+1)=0

so l v e f or x, x^{2} + x - p (p + 1) = 0

solvefor x,z=xy+f(x^2+y^2)

so l v e f or x, z = x y + f (x^{2} + y^{2})

solvefor h,r^2=h^2+(p^2)/(q^2)

so l v e f or h, r^{2} = h^{2} + \frac{p ^{2}}{q ^{2}}

solvefor x,f=(m-3)x^2+(4m-8)+3

so l v e f or x, f = (m - 3) x^{2} + (4 m - 8) + 3

5x^2+13x+30=0,x^2+13x

5 x^{2} + 13 x + 30 = 0, x^{2} + 13 x