Straight lines have a measure of 180°, so 52° + 59° + y = 180° y = 69°
The measure of the inner angles of a polygon = (n - 2)180° where n is the number of sides. The shape is a triangle, so n = 3. (3 - 2)180° = 63° + y + x 180° - 63° - (69°) = x
When raising an expression of that format to any power, after grouping like terms, you'll always find that the odd numbered terms are positive, and the even numbered terms are negative.
