Resolva: A) (x+2)^2=4 B) (x-3)^2=9.... Pergunta de ideia deJPS10

December 2019 1 80 Report

Resolva:

A) (x+2)^2=4

B) (x-3)^2=9

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exalunosp A
( x + 2)² = 4
(x)² + 2.2.x + 2² = 4 ou x² + 4x + 4= 4
x² + 4x + 4 - = 0
x² + 4x = 0
x( x + 4) = 0
x = 0 ***
x + 4 = 0
x = -4 ****
b

( x - 3)² = 9
(x)² - 2.3 .x + 3² = 9
x² - 6x + 9 - 9 = 0
x² - 6x = 0
x( x - 6) = 0
x = 0 ***
x - 6 = 0
x = 6 ****

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