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Polni kvadratni ravenki
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丱亳亳舒仆 弌仂从仂于从亳
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Polni kvadratni ravenki
1.
亠舒于舒亠 仆舒 仗仂仍仆亳
从于舒亟舒仆亳 舒于亠仆从亳 b賊 b 4ac 2 x 1,2= 2a
2.
弌仂 亰舒仄亠仆舒 仆舒
b=0亳 c=0于仂 仂仄仍舒舒 亰舒 亠亠仆亳舒 仆舒 仗仂仍仆舒舒 从于舒亟舒仆舒 舒于亠仆从舒, 亠 2 亟仂弍亳于舒舒 亠亠仆亳舒舒 仂亟 于亳亟仂 ax =0.亠. x 1=0 亳仍亳 x 2=0. 弌仂 亰舒仄亠仆舒 仆舒 b=0 ,亠 亟仂弍亳于舒舒 亠亠仆亳舒舒 仆舒 舒于亠仆从舒舒 仂亟 于亳亟仂 ax 2 +bx=0 .亠. x 1= c 仍亳 a x2 = c a . 弌仂 亰舒仄亠仆舒 仆舒 c=0 ,亠 亟仂弍亳于舒舒 亠亠仆亳舒舒 2 仆舒 舒于亠仆从舒舒 仂亟 于亳亟仂 ax +bx=0, b .亠. x 1=0 , 亳仍亳 x 2= . a
3.
亳仄亠 1: 2
3+1 x +3x+2=0 x 1,2= 2 a=1,b=3,c=2 x 1= 3+1 =1 2 3賊 3 412 2 x 1,2= x 2= 4 =2 21 2 3賊 98 M ={1,2} x 1,2= 2
4.
亳仄亠 2: 2 x
+x12=0 1賊7 x 1,2= a=1,b=1,c=12 2 6 1賊 1 41(12) 2 x 1= =3 2 x 1,2= 21 1賊 1+48 17 8 x 1,2= x 2= = =4 2 2 2
5.
亰舒弍仂亳仍:
亠仆仂: 丱亳亳舒仆 亳舒仆舒 弌仂从仂于从亳 于舒仆仂于从舒
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