solve the following quadratic equations by completing the square method . x² - 4x +3=0
Answers
Answered by
0
Answer:
Add
1
to both sides of the equation to get:
x
2
+
4
x
+
4
=
1
The left hand side is now a perfect square:
x
2
+
4
x
+
4
=
(
x
+
2
)
2
So we have:
(
x
+
2
)
2
=
1
Hence:
x
+
2
=
±
√
1
=
±
1
Subtract
2
from both ends to get:
x
=
−
2
±
1
That is
x
=
−
3
or
x
=
−
1
Answered by
1
Answer:
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