document.write( "Question 443579: Solve each equation....\r
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\n" ); document.write( "\n" ); document.write( "(B) x(5x+1)=18 (C) (x-8)(x+6)=15
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Algebra.Com's Answer #305931 by edjones(8007)\"\" \"About 
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(B)
\n" ); document.write( "x(5x+1)=18
\n" ); document.write( "5x^2+x-18=0
\n" ); document.write( "5*-18=-90; 10 and -9 are the two factors of -90 whose sum is 1.
\n" ); document.write( "5x^2+10x-9x-18=0
\n" ); document.write( "5x(x+2)-9(x+2)=0
\n" ); document.write( "(5x-9)(x+2)=0
\n" ); document.write( "x=-2, x=9/5
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