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GustavoQuez
@GustavoQuez
December 2019
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A solução da equação (2x-4)(x+3) é
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Verified answer
Olá!
(2x-4).(x+3)
2x²+6x-4x-12
2x²+2x-12=0
Δ=2²-4.2.(-12)
Δ=4-8.(-12)
Δ=4+96
Δ=100
x'= -2+10 /4
x'=8 /4
x'=2
x"= -2-10 /4
x"= -12 /4
x"= -3
S={2, -3} <----
7 votes
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Verified answer
Olá!(2x-4).(x+3)
2x²+6x-4x-12
2x²+2x-12=0
Δ=2²-4.2.(-12)
Δ=4-8.(-12)
Δ=4+96
Δ=100
x'= -2+10 /4
x'=8 /4
x'=2
x"= -2-10 /4
x"= -12 /4
x"= -3
S={2, -3} <----