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Nanda18121971
@Nanda18121971
September 2019
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-9x²+6x-4=0; x²-64=0;x²-49=0
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jezebel
-9x²+6x-4=0
a= -9 b=6 c=-4
Δ=36-144 Δ= -108
Delta menor que zero, a conta acaba aqui
x²-64=0 x= {-8,8}
a=1 b=0 c=-64
Δ=0²-4*1*(-64) Δ=256 √Δ=√256 √Δ=16
x'=0+16/2 x'= 16/2 x'=8
x''= 0-16/2 x''= -16/2 x''= -8
x²-49=0 x={-7,7}
a=1 b=0 c= -49
Δ=0-4*1*(-49)
Δ=196 √Δ=√196 √Δ= 14
x'=14/2 x'=7
x''= -14/2 x''= -7
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a= -9 b=6 c=-4
Δ=36-144 Δ= -108
Delta menor que zero, a conta acaba aqui
x²-64=0 x= {-8,8}
a=1 b=0 c=-64
Δ=0²-4*1*(-64) Δ=256 √Δ=√256 √Δ=16
x'=0+16/2 x'= 16/2 x'=8
x''= 0-16/2 x''= -16/2 x''= -8
x²-49=0 x={-7,7}
a=1 b=0 c= -49
Δ=0-4*1*(-49)
Δ=196 √Δ=√196 √Δ= 14
x'=14/2 x'=7
x''= -14/2 x''= -7