-x²+30-200=0怎么算
-x²+30-200=0怎么算
-x²+30-200=0
-x^2=170
x^2=-170
无解
-x²+30x-200=0
x^2-30x+200=0
(x-20)(x-10)=0
x=20或x=10
求解 x²-30x+200=0
x²-30x+200=0
(x-20)(x-10)=0
x1=20 x2=10
x²-30x+200怎么解
x^2-30x-200
=(x-20)(x-10)
x²+6x-27=0, x²-2x-80=0, x²+10x-200=0, x²-20x+96=0, x²+23x+76=0,
x²+6x-27=0
(x-3)(x+9)=0
x=3或x=-9
x²-2x-80=0
(x-10)(x+8)=0
x=10或x=-8
x²+10x-200=0
(x+20)(x-10)=0
x=-20或x=10
x²-20x+96=0
(x-8)(x-12)=0
x=8或x=12
x²+23x+76=0
(x+4)(x+19)=0
x=-4或x=-19
X²-X=0怎么算
X²-X=0怎么算?
x²-x=0,
x(x-1)=0,
x=0, 或 x-1=0,
x=0, 或 x=1.
x²-6x=0 怎么算
x²-6x=0 怎么算
解:
x²-6x=0
x(x-6)=0
x1=0 ,x2=6
x²+x-4=0怎么算
x²+x-4=0怎么算
x²+x+1/4=4+1/4
(x+1/2)²=17/4
x+1/2=±√17/2
z=-1/2±√17/2
=(-1±√17)/2
x²-4x≤0怎么算
x²-4x≤0
x(x-4)≤0
0≤x≤4
x²-3x≥0 怎么算?
X²-3X≥0
X(X-3)≥0
解得 X≤0或X≥3
-x²-x+30≥0
-x²-x+30≥0
x²+x-30≤0
(x+6)(x-5)≤0
-6≤x≤5
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