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Lele45295220
@Lele45295220
November 2019
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Determine o valor numérico da expressão
₊
₊3 para a= -5
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thiaggog10
Verified answer
X² +2a +3=0 : a =-5 então subistitua
x² + 2.(-5) +3=0
x² + (-10) +3=0
x² -10 +3=0
x² -7=0
x²=7
x=
agora subistitua
x² + 2a +3
+ 2.(-5) +3 agora corta a raiz com o quadrado
7 + (-10) +3
7 -10 +3
10-10=0
1 votes
Thanks 1
thiaggog10
conseguiu entender ??
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Verified answer
X² +2a +3=0 : a =-5 então subistituax² + 2.(-5) +3=0
x² + (-10) +3=0
x² -10 +3=0
x² -7=0
x²=7
x= agora subistitua
x² + 2a +3
+ 2.(-5) +3 agora corta a raiz com o quadrado
7 + (-10) +3
7 -10 +3
10-10=0