2x^2-3x+7=0 .find the root by using completing the square
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Answered by
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We can use the quadratic equation to solve this problem:
The quadratic formula states:
For
a
x
2
+
b
x
+
c
=
0
, the values of
x
which are the solutions to the equation are given by:
x
=
−
b
±
√
b
2
−
(
4
a
c
)
2
⋅
a
Substituting:
2
for
a
3
for
b
7
for
c
gives:
x
=
−
3
±
√
3
2
−
(
4
⋅
2
⋅
7
)
2
⋅
2
x
=
−
3
±
√
9
−
56
4
x
=
−
3
±
√
−
47
4
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