SOLUTION: (a) Expand (a + 1/a)^2 (b) Given that a + 1/a =7, use your result in (a) to find the value of a^2 + 1/a^2

Question 1038495: (a) Expand (a + 1/a)^2
(b) Given that a + 1/a =7, use your result in (a) to find the value of a^2 + 1/a^2
Answer by Othel(27) (Show Source): You can put this solution on YOUR website!
In problem 'a' we are asked to expand the expression. So...

which is...

Problem 'b' states that the expression within parenthesis in problem 'a' is equal to 7, and squaring that equals 49.
so...

In order to find the value of , we subtract 2 from both sides of our previous equation.

I hope this helps! Learn on
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