Question

If a, b and y are zeroes of the polynomial x3-12x2-2x+30 then the value of ab+by+ba is _______.

Answer 1

Answer:

-2

Step-by-step explanation:

Given polynomial, f(x) = x³ - 12x² - 2x + 30; a = 1, b = -12, c = -2, d = 30

Given zeroes: α, β, γ

Sum of product of zeroes taken two at a time = αβ + βγ + γα = c/a

Thus, αβ + βγ + γα = c/a = -2/1 = -2