Question

If y – 3 and y + 3 are the factors of 4y3 + ay2 + by, then (a – b) is equal to

Answer 1

Step-by-step explanation:

for finding zero

y -3=0

y = 3

p(y) = 4y3 +ay2 + by

p(3)= 4 ×3 ×3 + a ×3×2 + b×3

= 36+6a+b3

for finding zero

y+3=0

y= -3

p(y)= 4y3+ ay2 +by

p(-3) = 4×-3×3 +a ×-3 ×2+b× -3

= -36-6a -3b

36+6a +b3 = -36-6a-3b

it's incomplete but I think someone can help