Question

if -4 is the root of the equation x^2+px-4=0 and x^2+px+q=0 equation has equal roots the value of p and q

Answer 1

For x^2+px-4=0

Alpha = -4

Beta = ??

Alpha × Beta = c/a

-4 × Beta = -4

= -4

2nd zero = 1

For x^2+px+q=0

Both has se zero

therefore

Alpha = -4

Beta = 1

p = sum of zero ( -4+1 = -3 )

q = product of zero ( -4×1 = -4)

Answer 2

plz refer to this attachment