Which of the following constants can be added to x^2 + 2/3x to form a perfect square trinomial? a)1/9 b)4/9 c)4 and 1/9

Hello.

A trinomial is a perfect square if the square root of the first term times the square root of the third term times 2 equals the middle term.



a) Adding 1/9:



b) Adding 4/9:



c) Adding 4 and 1/9:



Hope I helped.

Draw a picture of 1/5 and get your answer from the picture

The percent discount was 120