13newbhal
13newbhal
10-01-2017
Mathematics
contestada
if 3x^2-2x+7=0 then (x-1/3)^2=
Respuesta :
phuong9822
phuong9822
10-01-2017
3x^2−2x+7=0
3x^2−2x+1/3+7−1/3=
0
3
(x^2−2x/3+1/9)
+7−1/3=0
3
(x−1/3)^
2
+(21−1)/3=0
3
(
x−1/3
)^
2
=−
20/3
(
x−
1/3
)^
2
=−
20/9
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