#1 ok, though fractions are usually written using a / instead of a :
(y+r)^2 = (5-9)^2 = (-4)^2 = 16
you did (y-r)^2
avoid using x as an operator; it's too easy to confuse it with a variable.
Check these please:
e=6 r=-9 y=5
er:3 +2y
6(-9) :3 +2(5)
-54 :3 +10
-18 + 10 = -8
(y + r )^2
5 +-9 x2
14x14=196
2 answers
r=-9
e=6
t=4/5
re/t=
-9 x 6/4/5=54 x4/5=54x5/4=67.5
check this I think this is ri
e=6
t=4/5
re/t=
-9 x 6/4/5=54 x4/5=54x5/4=67.5
check this I think this is ri