1)16-(6-11x)^2=0
-(6-11x)^2=-16
6-11x=16
6-11x=+-4
6-11x=-4
6-11x=4
x=10/11
x=2/11
2)(7m-13)^2-(9m+19)^2=0
49x^2-182x+169-81x^2-342x-361=0
-32x^2-542x-192=0
-4 (8x^2+128x+3x+48=0
-4 (8x (x+16)+3(x+16))=0
-4 (x+16)*(8x+3)=0
(x+16)*(8x+3)=0
x+16=0
8x+3=0
x=-16
x=-3/8