(m+1)*(n+1)
if there is a direct street from (0,0) to (m,n) : (m+1)*(n+1)+1
Answer:the first one
Step-by-step explanation:Egd
Answer:
(x+c)(x-d)
Step-by-step explanation:
if x²-ax-b=(x-c)(x+d)
from vieta theorem
c + d = -(-a)=a
cd = b
if x²+ax-b
from vieta theorem
c + d = -(a)=-a
cd = b
so the same c d but in opposite sign (x+c)(x-d)
