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you need to factorise the numerator and the denominator.Can someone me here in question Q 3 b.ii
numerator=> 2x^2 +11x+5
=2x^2+10x+x+5
=2x(x+5)+(x+5)
=(2x+1)(x+5)
denominator=>x^2 -25
=(x+5)(x-5)
Now solving=> (2x+1)(x+5)/(x+5)(x-5)
(x+5) gets cancelled being the common factor
so the answer is 2x+1/x-5