Monday, April 21, 2014

(x-a)/(x+a) - (x+a)/(x-a)=7/12 solve the equation

%0D%0A%28x-a%29%2F%28x%2Ba%29+-+%28x%2Ba%29%2F%28x-a%29=7%2F12%0D%0A

then...



%0D%0A%28-4%2Aa%2Ax%29%2F%28x%5E2-a%5E2%29=7%2F12%0D%0A

%0D%0A-48%2Aa%2Ax=7%28x%5E2-a%5E2%29%0D%0A

%0D%0A7x%5E2%2B48%2Aa%2Ax-7a%5E2=0%0D%0A
%0D%0A%287+x-a%29+%287+a%2Bx%29=0%0D%0A
so x=a/7 or x=-7a but in either case
+x+%3C%3E+-a and x%3C%3E0
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