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受欢迎的代数 >

4s^2-11s-3=0

解答

4 s^{2} - 11 s - 3 = 0

解答

s = 3, s = - \frac{1}{4}

+1

十进制

s = 3, s = - 0.25

求解步骤

4 s^{2} - 11 s - 3 = 0

使用求根公式求解

s_{1, 2} = \frac{- ( - 11 ) \pm ( - 11 ) ^{2} - 4 \cdot 4 ( - 3 )}{2 \cdot 4}

(- 11)^{2} - 4 \cdot 4 (- 3) = 13

s_{1, 2} = \frac{- ( - 11 ) \pm 13}{2 \cdot 4}

将解分隔开

s_{1} = \frac{- ( - 11 ) + 13}{2 \cdot 4}, s_{2} = \frac{- ( - 11 ) - 13}{2 \cdot 4}

s = \frac{- ( - 11 ) + 13}{2 \cdot 4} : 3

s = \frac{- ( - 11 ) - 13}{2 \cdot 4} : - \frac{1}{4}

二次方程组的解是:

s = 3, s = - \frac{1}{4}

作图

流行的例子

3 x^{2} + 15 x = - 22

30 + 27 x = 400 - x^{2}

solvefor y,4x^2+5xy+y^2+3x-2y-7=0

so l v e f or y, 4 x^{2} + 5 x y + y^{2} + 3 x - 2 y - 7 = 0

solvefor x,t(x)=-2x+1/3 x^2

so l v e f or x, t (x) = - 2 x + \frac{1}{3} x^{2}

roo t s x^{2} + 3