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TCaiafa
@TCaiafa
May 2020
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Resolva a equação, sendo U=R:
(x/3 + 3)² - (x/3 - 3)² = 2x/3 + 9
URGENTE, TRABALHO!
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3478elc
Verified answer
( x + 3)² - ( x - 3)² = 2x/3 + 9
F
3 3
x²
+
2.x.3
+ 9 = x² + 2x + 9
9 3 9 3
x² + 2x + 9 - ( x² + 2x + 9 )
9 3 9 3
x² + 2x + 9 - x² - 2x + 9 )
9 3 9 3
9 + 9 = 2x + 9 mmc= 3
3
27 + 27 = 2x + 27
- 2x += 27 - 27 - 27
- 2x = - 27(-1)
2x = 27
x = 27/2
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Verified answer
( x + 3)² - ( x - 3)² = 2x/3 + 9 F
3 3
x² + 2.x.3 + 9 = x² + 2x + 9
9 3 9 3
x² + 2x + 9 - ( x² + 2x + 9 )
9 3 9 3
x² + 2x + 9 - x² - 2x + 9 )
9 3 9 3
9 + 9 = 2x + 9 mmc= 3
3
27 + 27 = 2x + 27
- 2x += 27 - 27 - 27
- 2x = - 27(-1)
2x = 27
x = 27/2