x2 + y2 = x2 - 2xy + y2 + 2xy = (x - y)2 + 2xy = 72 + 2*8 = 49 +
16 = 65
You could, instead, solve the two equations for x and y and
substitute, but the above method is simpler.
That depends what either the value of a or the value of b
It is 34.
n equals 52
There is no numerical value for 'x' that can make this a true
If a plus b equals 6 what is the value of 3a plus 3b