If q, r > 0, then roots of equation x2 + qx + r = 0 are
A.
Both negative
B.
Both positive
C.
Of positive sign but equal magnitude
D.
Of opposite sign

• sum of roots=-q
  product=r
  means both -ve roots
• 10 years agoHelpfull: Yes(13) No(0)
• both will be -ve
• 10 years agoHelpfull: Yes(5) No(0)
• nswer must be both negative (A)
  as m+n= -q
  and m*n = r
  
  if m and n are of opposite sign, then m*n must be negative
  But r is a positive number...
  
  if both m and n are positive, then m+n must be positive..
  but m+n is negative here..
  
  which shows that m and n both are negative...
• 10 years agoHelpfull: Yes(3) No(0)
• Both must be positive
  
  because
  sum=+ and only + + += +
  product=+ and + * +=+ if we take - & -then sum may be -ve or +ve
  as dont know exact sign and greater no's sign
• 10 years agoHelpfull: Yes(0) No(3)