1) (x+11)^2-x^2=11
x^2+2*11*x+121-x^2=11
22x=11-121
22x=-110
x= -5
2) 44+z^2=(12+z)^2
44+z^2= 144 + 2*12*z + z^2
44-144 = 24z- z^2+z^2
24z = -100
z= - 100/24
z= -25/6
1) (x+11)^2-x^2=11
x^2+2*11*x+121-x^2=11
22x=11-121
22x=-110
x= -5
2) 44+z^2=(12+z)^2
44+z^2= 144 + 2*12*z + z^2
44-144 = 24z- z^2+z^2
24z = -100
z= - 100/24
z= -25/6