diane8879
26.06.2019 •
Mathematics
Expand the polynomial and simplify: (y–9)^2
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Ответ:
= y^2 -18y +81
Step-by-step explanation:
(y–9)^2
(y-9) (y-9)
FOIL
first: y*y = y^2
outer: -9y
inner: -9y
last: -9*-9 = 81
Add them all together = y^2 -9y-9y+81
= y^2 -18y +81
Ответ:
B
Step-by-step explanation: