Answer:
Step-by-step explanation:
4
x
2
−
81
=
0
Add
81
to both sides of the equation.
4
x
2
=
81
Divide each term by
4
and simplify.
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x
2
=
81
4
Take the square root of both sides of the equation to eliminate the exponent on the left side.
x
=
±
√
81
4
The complete solution is the result of both the positive and negative portions of the solution.
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x
=
9
2
,
−
9
2
