Question

If x - y = 12, xy = 5 find x² + y = ?

Answer 1

Answer:

is this correct question ?

If x-y =12, xy=5. Find x2 +y2 = ?

squaring on both sides

sol : (x-y)2 = (12)2

x2-2xy+y2=144

x2+y2 = 144+ 2(5)

x2+y2 = 144 + 10 =154