Question

Find the cubic polynomial whose zeroes are 3,4 and -5

Answer 1

Answer:

Step-by-step explanation:

when X = 3 ,

X-3 = 0

when X = 4 ,

X-4 = 0

When X = -5 ,

X+5 = 0

Multiply the three factors to get your cubic polynomial...

(X - 3) (X - 4) (X + 5) = P(X)

(X² - 7X + 12) (X + 5) = P(X)

Therefore P(X)=

X³ - 2X² - 23X + 60