4 x square + 12 x + 9 solve this math
Answers
Answered by
2
Step-by-step explanation:
In
4
x
2
−
12
x
+
9
=
0
as niddle term
−
12
x
is twice the product (with negative sign) of square roots of first (
s
q
t
(
4
x
2
)
=
2
x
) and third term (
√
9
=
3
,
it can be factorized using formula
a
2
−
2
a
b
+
b
2
=
(
a
−
b
)
2
Hence
4
x
2
−
12
x
+
9
=
0
⇔
(
2
x
)
2
−
2
×
3
×
3
x
+
3
2
=
0
or
(
2
x
−
3
)
2
=
0
and hence
2
x
=
3
or
x
=
3
2
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