Question

If alpha and beta are roots of equation x^2-8x+15=0.find alpha^3-beta^3

Answer 1

Answer:

98

Step-by-step explanation:

x^2-8x+15 = 0

middle term splitting

x^2-3x-5x+15 = 0

x(x-3) -5(x-3) = 0

(x-3) (x-5) = 0

x-3 =0 or x-5=0

x= 3 or x=5

alpha = 3

beta = 5

alpha^3-beta^3. (put the value)

3^3-5^3

27-125

98.