Answer:
=−9
=9
Explanation:
4
2
=
3
4x^{2}=324
4x2=324
−
04
0
4x^{2}-324=0
4x2−324=0
(
8
1
)
4(x^{2}{\color{#c92786}{-81}})=0
4(x2−81)=0
+
9
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