Question

If a and B are zeroes of the polynomial x2+3x + 4 then the value of ab(a+B) is a) -12 c) 3 d) 4​

Answer 1

Answer:

12

Step-by-step explanation:

x² + 3x - 4 = 0

x² + 4x - x - 4 = 0

x (x + 4) - 1(x + 4) = 0

(x - 1) (x + 4) = 0

x = 1 & -4

a = 1 & b = -4

value of ab(a+b) = 1×(-4) (1 + (-4))

value of ab(a+b) = -4 × -3 = 12