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29 August, 16:24

Solve: 16x2 - 81 = 0.

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  1. 29 August, 16:31
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    Hi there! First we need to add 81 to both sides. 16x2-81+81=0+81=16x2=81. 16x2/16=81/16. Now we get x²=81/16. Now, we have to take the square root. That would be 2.25 or - 2.25 it really doesn't matter which answer it is. Therefore, the answer is x=2.25 or x=-2.25.
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