NEED HELP ASAP!! Find a two-variable identity by incorporating a second variable, y, into the single-variable identity. Note that x > 1, x > y, and x and y are positive integers. (x2 − y2)2 − (2xy)2 = (x2 + y2)2 (x2 + y2)2 + (2xy)2 = (x2 − y2)2 (x2 − y2)2 + (2xy)2 = (x2 + y2)2 (x2 − y2)2 + (2xy)2 = (x2 − y2)2

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!