document.write( "Question 470845: Solve (x+20)(x-19)(x+19)>0 The solution set is {x|_} \n" ); document.write( "

Algebra.Com's Answer #322952 by lwsshak3(11628) $\"\"$ $\"About$

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Solve (x+20)(x-19)(x+19)>0
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\n" ); document.write( "f(x)= (x+20)(x-19)(x+19)>0
\n" ); document.write( "show roots or zeros on number line, then determine sign of f(x) within intervals
\n" ); document.write( "-∞..................-20...........-19............19............∞ (number line)
\n" ); document.write( "(x+20)......-.......0......+.......0......+......0.....+.....∞
\n" ); document.write( "(x+19)......-.......0......-.......0.......+......0....+.....∞
\n" ); document.write( "(x-19)......-........0......-.......0.......-......0.....+....∞
\n" ); document.write( "f(x)......... .-.......0......+.......0.......-......0.....+.....∞\r
\n" ); document.write( "\n" ); document.write( "solution: (-20,-19) U (19,∞) \n" ); document.write( "

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