nickonicyetlan
06.05.2020 •
Mathematics
(5x-6)^2=25x^2-60x+36. Where did the -60x come from?
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Ответ:
see below
Step-by-step explanation:
(5x-6)^2
This means
(5x-6)*(5x-6)
FOIL
First: 5x*5x = 25x^2
outer: 5x*-6 = -30x
inner -6*5x = -30
last -6*-6 = 36
Add these together
25x^2 -30x-30x +36
Combine like terms
25x%2 -60x+36
Ответ:
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