document.write( "Question 398174: Hai sir, please help me on this problem, \r
\n" ); document.write( "\n" ); document.write( "3)If the points (-2,1),(a,b) and (4,-1) are collinear and a-b=1. then find the values of a and b. \n" ); document.write( "

Algebra.Com's Answer #282135 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "points (-2,1),(a,b) and (4,-1) are collinear
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document.write( "Using the point-slope formula, 
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document.write( "(-2,1 and 
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document.write( "(4,-1)   m =  2/ -6 = -1/3
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document.write( "(-2,1),
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document.write( "(a,b)    |Question states: (a-b) = 1, a = 1+b
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document.write( "(1-b) / (-2-(1+b))     |substituting for a
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document.write( "(1-b)/ (-3 - b) = -1/3 
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document.write( "  -1(-3-b) = 3(1-b)    |cross multiplying
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document.write( "    3 + b = 3 - 3b
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document.write( "        4b = 0
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document.write( "         b = 0  and a = 1    (a = 1+b)
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document.write( "CHECKING our Answer***
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document.write( "(-2,1),
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document.write( "(1,0)  m = 1/-3   \n" );
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