Seudónimo Seudónimo

13-02-2019
Mathematics

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PLS HELP I'LL GIVE BRAINLIEST What are solutions to the equation y^2 - 1 = 80 -5 and 5 -4 and 4 -7 and 7 -9 and 9 which one???

Respuesta :

14-02-2019

y² - 1 = 80

y² - 81 = 0

(y + 9)(y - 9) = 0

y = -9 and y = 9

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