minta bantu dong jwbn nya sama cara nya thx..

m+n = - b/a
m.n = c/a

(m+2)(n+2) = r/a
m.n + 2(m+n) + 4 = r/a
c/a + 2(-b/a) + 4a/a = r/a
(c-2b+4a)/a = r/a
r = c-2b+4a

(m+2)+(n+2) = - q/a
(m+n) + 4 = - q/a
-b/a + 4a/a = - q/a
(-b+4a)/a = - q/a
q = b-4a

q+r = b-4a+c-2b+4a = c-b (C)

m+n =-b/a......(1)
m.n= c/a.........(2)

m+2+n+2 = -q/a
m+n+4=-q/a
m+n=-q/a -4
m+n= -(q+4a)/a
subs ke (1)
-b/a=-(q+4a)/a
b=q+4a
q= b-4a.........(3)



(m+2).(n+2)=r/a
mn+2(m+n)+4=r/a
subs (1) dan (2)
c/a + 2(-b/a) +4 = r/a
samain penyebutnya
(c-2b+4a)/a = r/a
c-2b+4a = r........(4)

maka
q+r= b-4a+c-2b+4a
=-b+c
C