solve the following quadratic equations by completing square method (I) x square - 3x-2=0
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Answer:
3x
2
−x−2=0
9x
2
−3x−6=0
(multiplying both sides by 3)
9x
2
−3x=6
Adding (1/2)
2
on both sides.
(3x)
2
−2.3x.
2
1
+(
2
1
)
2
=+(
2
1
)
2
(3x−
2
1
)
2
=6+
4
1
=
4
25
=(
2
5
)
2
3x−1/2=5/2 or 3x−1/2=−5/2
x=1 or x=−2/3
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