(1)x^2-8x-4=0
(2)x^2+3x+2=0(3)-x^2+5x+6=0(4)x^2=4根号3x-11这三个式子用配方法怎么解...
(2)x^2+3x+2=0 (3)-x^2+5x+6=0 (4)x^2=4根号3 x-11 这三个式子用配方法怎么解
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x^2-8x-4=0
x²-8x+16-20=0
(x-4)²-(2√5)²=0
(x-4+2√5)(x-4-2√5)=0
x①=4-2√5
x②=4+2√告没碰5
x^2+3x+2=0
(x+1)(x+2)=0
x①=-1
x②=-2
-x^2+5x+6=0
x²-5x-6=0
(x+1)(x-6)=0
x①=-1
x②=6
x^2=4根号袜谈察颤3 x-11
x²-4√3*x+11=0
x²-4√3*x+12-1=0
(x-2√3)²-1=0
(x-2√3+1)(x-2√3-1)=0
x①=2√3-1
x②=2√3+1
x²-8x+16-20=0
(x-4)²-(2√5)²=0
(x-4+2√5)(x-4-2√5)=0
x①=4-2√5
x②=4+2√告没碰5
x^2+3x+2=0
(x+1)(x+2)=0
x①=-1
x②=-2
-x^2+5x+6=0
x²-5x-6=0
(x+1)(x-6)=0
x①=-1
x②=6
x^2=4根号袜谈察颤3 x-11
x²-4√3*x+11=0
x²-4√3*x+12-1=0
(x-2√3)²-1=0
(x-2√3+1)(x-2√3-1)=0
x①=2√3-1
x②=2√3+1
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