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Dicassobretudo7
@Dicassobretudo7
August 2019
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Gente me ajudem a fazer só a letra A
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2x²+x-1=0
a=2 b= 1 c=-1
Δ=b²-4.a.c >>>>>> x=-b+/-VΔ/2.a
Δ=1²-4.2.(1 ) x=-1+/-V9/2.2
Δ=1+8 x=-1+/-3/4
Δ=9 x=-1+3/4
x=+2/4
x=1/2
x=-1-3/4
x=-4/4
x=-1
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a=2 b= 1 c=-1
Δ=b²-4.a.c >>>>>> x=-b+/-VΔ/2.a
Δ=1²-4.2.(1 ) x=-1+/-V9/2.2
Δ=1+8 x=-1+/-3/4
Δ=9 x=-1+3/4
x=+2/4
x=1/2
x=-1-3/4
x=-4/4
x=-1