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ErickLima1001
@ErickLima1001
January 2020
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Se x² = 25 e y² = 16, então o valor da expressão (x+ y) . (x - y) é:
a) 5
b) 6
c) 9
d) 20?
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BrivaldoSilva
(x+y).(x-y)
x^2-y^2
25-16=9
1 votes
Thanks 1
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x^2-y^2
25-16=9