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OpenStudy (anonymous):
Solve for x: 16x2 - 81 = 0
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OpenStudy (tkhunny):
Can you say "Difference of Squares"? Do it!
OpenStudy (idealist10):
16x^2-81=0 (4x-9)(4x+9)=0 4x-9=0 4x+9=0 4x=9 4x=-9 x=9/4, -9/4.
OpenStudy (idealist10):
You need to factor out.
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