Need help figuring out A=

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

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)