Express (7x + 3a)(7x+5a)(7x+9a)(7x+11a) + 61a^4 as the sum of two squares

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

Describe how making an ‘and’ compound sentence effects your solution set

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)