If px²+ 3x + q = 0 has two roots x = -1 and x = -2, the value of q - p is

If px²+ 3x + q = 0 has two roots x = -1 and x = -2, the value of q -

1.	If px²+ 3x + q = 0 has two roots x = -1 and x = -2, the value of q - p is
Answer» Your and is wrong ? When x=-1Equation1: p(-1)^2 + 3(-1) +q=0p - 3 + q = 0=> q = 3 - p.......aEquation2: p(-2)^2 + 3(-2) + q = 0 4p - 6 + q = 0From eq a:4p - 6 + 3- p = 0 .°. p = 1 So, q =3-p q = 2Now, q - p = 2-1 = 1.......ans.