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CahLuiza
@CahLuiza
January 2020
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Simplifique as expressões
a(5a-1)+(a+2)²
(y-3)(y+2)-(y+1)²
(2a+3b)²-4a(a+3b)
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AnaWerena
A) 6a² +3a +4
a(5a - 1) +(a + 2)²
(5a² -1a) +(a + 2) . (a + 2)
5a² -1a + a² + 4a + 4
6a² +3a +4
b) 3y - 7
(y - 3) (y + 2) - (y + 1)²
(y - 3) . (y + 2) - (y + 1) . (y + 1)
y² + 2y - 3y -6 -(y² + 2y + 1)
y² + 2y - 3y -6 -y² -2y - 1
-3y - 7
c) 9b²
(2a + 3b)² - 4a(a +3b)
(2a + 3b) . (2a + 3b) - 4a . (a +3b)
4a² + 12ab + 9b² - 4a² - 12ab
9b²
Espero ter ajudado ;) Se puder avaliar minha resposta ficarei grata. Bons estudos!!!
3 votes
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a(5a - 1) +(a + 2)²
(5a² -1a) +(a + 2) . (a + 2)
5a² -1a + a² + 4a + 4
6a² +3a +4
b) 3y - 7
(y - 3) (y + 2) - (y + 1)²
(y - 3) . (y + 2) - (y + 1) . (y + 1)
y² + 2y - 3y -6 -(y² + 2y + 1)
y² + 2y - 3y -6 -y² -2y - 1
-3y - 7
c) 9b²
(2a + 3b)² - 4a(a +3b)
(2a + 3b) . (2a + 3b) - 4a . (a +3b)
4a² + 12ab + 9b² - 4a² - 12ab
9b²
Espero ter ajudado ;) Se puder avaliar minha resposta ficarei grata. Bons estudos!!!