复数方程x²+x+4=0x²+2x+5=0
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复数方程x²+x+4=0x²+2x+5=0复数方程x²+x+4=0x²+2x+5=0复数方程x²+x+4=0x²+2x+5=0(1)x^2+
复数方程x²+x+4=0x²+2x+5=0
复数方程
x²+x+4=0
x²+2x+5=0
复数方程x²+x+4=0x²+2x+5=0
(1)
x^2+x+1/4=-17/4
(x+1/2)^2=-17/4
x+1/2=(根号7)/2*i或x+1/2=-(根号7)/2*i
所以x=-1/2+(根号7)/2*i或x=-1/2-(根号7)/2*i
(2)
x^2+2x+1=-6
(x+1)^2=-6
x+1=根号6*i或x+1=-根号6*i
所以x=-1+根号6*i或x=-1-根号6*i
楼上没错..
(1)
X ^ 2 + X +1 / 4 = -17 / 4
(X +1 / 2)^ 2 = -17 / 4
X +1 / 2 =(根7)/ 2 * i或x +1个/ 2 = - (根)/ 2 *
所以所述= -1 / 2 +(根)/ 2 * I或x = - 1/2-(根)/ 2 * I
(2)
X ^ 2 +2 X +1 = -6 <...
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(1)
X ^ 2 + X +1 / 4 = -17 / 4
(X +1 / 2)^ 2 = -17 / 4
X +1 / 2 =(根7)/ 2 * i或x +1个/ 2 = - (根)/ 2 *
所以所述= -1 / 2 +(根)/ 2 * I或x = - 1/2-(根)/ 2 * I
(2)
X ^ 2 +2 X +1 = -6
(X +1)^ 2 = -6
X +1 =根* i或X +1 = - 根*
= -1 +根6 * I或x = -1 - 根6 * I
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