Question 301926
(x^2-49)/z÷(z+7)/(z-8)

i think you mistype the z as x

x^2 - 49 = (x+7)(x-7) 

Therefore ,(x^2-49)/z÷(z+7)/(z-8)

(x+7)(x-7)/z ÷ (z+7)/(z-8)

=(x+7)(x-7)/z multiply (z-8)/(z+7)

if you have miss type z as x

you only need to cancel out (z+7)

answer: (z-7)(z-8)/(z)