128=40 n^2-40n find n
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Step-by-step explanation:
u
uu
i
I
u
x
d
I
I
y
u
u
u
u
u
u
u
u
uu
u
p
p
u
p
y
I
y
e
.u
u
u
I
ibid
I
uu
u
ii
ii
iii
I
I
I
d
d
I
d
d
d
hii
u
p
u
e
e
.
u
I
bb
dd
d
b
I
I
I
I
I
I
I
I
I
u
y
b
I
b
b
b
bb
b
bb
b
i
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