Solve by using completing square 2x^2-x-1=0
Answers
Answered by
1
Hi
pls follow me
I give answer
Answered by
1
2
x
2
−
3
x
+
1
=
0
x
2
−
3
x
2
+
1
2
=
0
x
2
−
3
x
2
+
(
3
4
)
2
=
(
3
4
)
2
−
1
2
(
x
−
3
4
)
2
=
9
16
−
8
16
(
x
−
3
4
)
2
=
1
16
x
−
3
4
=
±
1
4
x
=
3
4
±
1
4
Therefore:
x
=
1
,
1
2
Similar questions