document.write( "Question 1148023: Find b such that the points A(2,b),B(5,5)and C(-6,0) are the vertices of right angled \"highlight%28triangle%29\" with angle < BAC = 90 degree. \n" ); document.write( "
Algebra.Com's Answer #769388 by greenestamps(13198)\"\" \"About 
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\n" ); document.write( "corrected response.... the slopes are negative reciprocals, not equal!

\n" ); document.write( "The right angle is at A, so segments BA and CA are perpendicular; so the product of their slopes is -1.

\n" ); document.write( "AB slope: (5-b)/3
\n" ); document.write( "AC slope: b/8

\n" ); document.write( "\"%28%285-b%29%2F3%29+%2A+%28b%2F8%29+=+-1\"
\n" ); document.write( "\"5b-b%5E2%2F24+=+-1\"
\n" ); document.write( "\"b%5E2-5b+=+24\"
\n" ); document.write( "\"b%5E2-5b-24+=+0\"
\n" ); document.write( "\"%28b-8%29%28b%2B3%29+=+0\"
\n" ); document.write( "\"b+=+8\" or \"b+=+-3\"

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