Penjelasan dengan langkah-langkah:
x²-3x-2=0
x1+x2= -b/a= 3
x1 . x2= c/a= -2
akar akarnya X1+2 dan X2+2
(x1+2)(x2+2)
=x1x2+2x1+2x2+4
=x1x2 + 2(x1+X2)+4
= -2 + 2.3+4
=8
(x1+2)+(X2+2)
=x1+X2+4
=3+4= 7
persamaan kuadrat baru
x²-(x1+2+X2+2)x +(x1+2)(X2+2)=0
x²-8x+5=0
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Penjelasan dengan langkah-langkah:
x²-3x-2=0
x1+x2= -b/a= 3
x1 . x2= c/a= -2
akar akarnya X1+2 dan X2+2
(x1+2)(x2+2)
=x1x2+2x1+2x2+4
=x1x2 + 2(x1+X2)+4
= -2 + 2.3+4
=8
(x1+2)+(X2+2)
=x1+X2+4
=3+4= 7
persamaan kuadrat baru
x²-(x1+2+X2+2)x +(x1+2)(X2+2)=0
x²-8x+5=0