SOLUTION: 16x^2=81

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Question 143221: 16x^2=81

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
subtracting 81 __ 16x^2-81=0 __ factoring (difference of squares) __ (4x+9)(4x-9)=0

4x+9=0 __ 4x=-9 __ x=-9/4

4x-9=0 __ 4x=9 __ x=9/4