document.write( "Question 110036: Help! I need help with a couple of problems. \r
\n" ); document.write( "\n" ); document.write( "1. Solve the inequality. Give the solution set in interval notation and graph it. x^2-2x-3>0
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\n" ); document.write( "\n" ); document.write( "2.Find the real number c such that x^2-2/3x+c is a perfect square trinomial. \n" ); document.write( "

Algebra.Com's Answer #80173 by edjones(8007) $\"\"$ $\"About$

You can put this solution on YOUR website!
x^2-2x-3>0
\n" ); document.write( "(x-3)(x+1)>0
\n" ); document.write( "x>3, x>-1
\n" ); document.write( " $\"graph%28500%2C500%2C-10%2C10%2C-10%2C10%2Cx%5E2-2x-3%29\"$
\n" ); document.write( "X(-infinity,-1)U(3,infinity)
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\n" ); document.write( "x^2-2/3x+c
\n" ); document.write( "to find c in all problems of this type, divide b by 2 and square the result.
\n" ); document.write( "-2/3*1/2=-1/3
\n" ); document.write( "(-1/3)^2=1/9 Ans.
\n" ); document.write( "Check:
\n" ); document.write( "x^2-2/3x+1/9=(x-1/3)^2
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\n" ); document.write( "Ed\r
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