Question

If alpha and beta are the zeros of x square -5x +6 . Then find alpha cube - beta cube.

Answer 1

hello friend ..

here is your answer by Sujeet,
Given that polynomial,
x²-5x+6
Sum of zeroes=-b/a
a+b=-b/a
-(-5)/1=5

Product of zeroes=c/a
ab=c/a
6/1
6

Now,
A/q
a³-b³


we know that formula
a³-b³
(a+b)³-3ab(a+b)

now putting the value of a+b and ab

(5)³-3(6)(5)
125-90
35

that's all
.....

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