Question

plzzzz can u do this

Answer 1

x=2,1/2
f(2)=p×4+5×2+r
=4p+10+r

f(1/2)=p×1/4+5*1/2+r
=1/4p+5/2+r

multiply the second equation by 4
p+10+4r
first equation =second equation

4p+10+r=p+10+4r
4p+r=p+4r
4p-p=4r-r
3p=3r
divided both LHS and RHS by 3
p=r

hope it helps