SOLUTION: I dont even understand this problem at all. 81x^2-144=0. Whoever solves this, then i wish you the best because it's difficult.

Question 148769: I dont even understand this problem at all. 81x^2-144=0. Whoever solves this, then i wish you the best because it's difficult.
Found 2 solutions by nerdybill, jim_thompson5910:
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
Notice that you can "factor" it:
81x^2-144=0
(9x+12)(9-12)=0
.
therefore:
x = {-12,12}

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Add to both sides.

Combine like terms on the right side.

Divide both sides by to isolate .

Reduce.

Take the square root of both sides.

or Break up the expression

or Break up the square root.

or Take square root of 16 to get 4. Take square root of 9 to get 3.

So the answers are or

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