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受欢迎的代数 >

(x^2+x-2)=0

解答

(x^{2} + x - 2) = 0

解答

x = 1, x = - 2

求解步骤

(x^{2} + x - 2) = 0

因式分解

x^{2} + x - 2 : (x - 1) (x + 2)

(x - 1) (x + 2) = 0

使用零因数法则： If

ab = 0

then

a = 0

or

b = 0

x - 1 = 0 or x + 2 = 0

解

x - 1 = 0 : x = 1

解

x + 2 = 0 : x = - 2

二次方程组的解是:

x = 1, x = - 2

作图

流行的例子

p^{2} + 3 = 0

16 x^{2} - 48 x + 36 = 0

3 (x + 6) (x - 2) = 0

300 - 4.9 t^{2} = 0

solvefor x,2-2x-3x^2=0

so l v e f or x, 2 - 2 x - 3 x^{2} = 0