Answer:
x^2-16x+145+y^2-18y
Step-by-step explanation:
Answer: x^2-16x+y^2-18y+145
step one =x^2-16x+64+\left(y-9\right)^2
step 2= x^2-16x+64+y^2-18y+81
step 3=x^2-16x+y^2-18y+64+81
step 4=\mathrm{Add\:the\:numbers:}\:64+81=145
x^2-16x+y^2-18y+145
