Let a and b be the solutions to 5x^2 - 11x + 4 = 0 Find: 1/a^2 + 1/b^2.
1/a^2 + 1/b^2 = (a^2 + b^2)/(a^2b^2)
Using vietas, ab = 4/5, a + b = 11/5.
Can you do it from here?
Remember, a^2 + b^2 = (a+b)^2 - 2ab
=^._.^=
