Question 1149697
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<pre>

Since a + b = 2, square both sides to get


    (a + b)^2 = 4

    a^2 + 2ab + b^2 = 4


Next, replace ab by -1, since it is given.  You will get


    a^2 -2 + b^2 = 4,


which implies


    a^2 + b^2 = 4 + 2 = 6.


<U>ANSWER</U>.  Under the given conditions,  a^2 + b^2 = 6.
</pre>

Solved.



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Comment from student: &nbsp;Thanks a lot Ikleyn. &nbsp;What is the link of your website? &nbsp;I can share.
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<U>My response</U> : &nbsp;&nbsp;This forum is constructed in the way that i &nbsp;CAN &nbsp;NOT &nbsp;identify from whom I got the message/(the &nbsp;"comment").


Therefore, &nbsp;when I get the comment from the visitor in this way, &nbsp;I simply &nbsp;DON'T &nbsp;KNOW &nbsp;to whom to answer.


If you really want to get the response from me to your message/"comment",
then place the problem's ID number to your message/comment.


It is the only way to support a &nbsp;two-sides/(two-ways) &nbsp;<U>dialog</U>.