Question 348030
(x-7)/(x^2-16)-(x-1)/(16-x^2)
 
=[(x-7)+(x-1)]/(x^2-16) | by collecting
 
=(2x-8)/[(x-4)(x+4)] | by simplifying and factorizing denominator
 
=2(x-4)/[(x-4)(x+4)] | by factorizing numerator
 
=2/(x+4) | by simplifying