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Irysbm14
@Irysbm14
January 2020
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Equação 2° grau
x²-x-870=0
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FsFlavIaSilva
A=1
B= -1
C= -870
Δ=b²-4ac
Δ=(-1)²-4.1.(-870)
Δ=1+3480
Δ=3481 √3481=59
X= -b ± √Δ /2a
X= -(-1) ± 59 /2.1
X= 1 ± 59 /2
X'=1+59/2
X'=60/2
X'=30
X"=1-59/2
X"=58/2
X"=29
5 votes
Thanks 10
zEnderBR212
X²-x-870=0
x²+x=870-0
2x²=870
870÷2
x=435
2 votes
Thanks 3
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Lista de comentários
B= -1
C= -870
Δ=b²-4ac
Δ=(-1)²-4.1.(-870)
Δ=1+3480
Δ=3481 √3481=59
X= -b ± √Δ /2a
X= -(-1) ± 59 /2.1
X= 1 ± 59 /2
X'=1+59/2
X'=60/2
X'=30
X"=1-59/2
X"=58/2
X"=29
x²+x=870-0
2x²=870
870÷2
x=435