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brunosouza321
@brunosouza321
July 2022
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x²+3x-4=0 e em forma bhaskara
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Gilberg
a=1 b= 3 c = -4 Δ=b²-4ac = 3²-4*1*(-4) = 9+16 Δ=25 √Δ = √25 = 5
S={-4, 1}
1 votes
Thanks 1
carloseduaardo
A=1
b=3
c=-4
Δ=b²-4ac
Δ=3²-4*1*(-4)
Δ=9+16
Δ=25
X'=(-b
+
√Δ)/2a
X'=(-3
+
)2a
X'=(-3
+
5
)
/2*1
X'=-3-5/2
X'=-8/2
X'=-4
X"=-3+5/2
X"=2/2
X"=1
Tirando a prova:
Para X'=-4
x²+3x-4=0
-4²+3*(-4)-4=0
16+-12-4=0
16-16=0
0=0
Para X"=1
1²+3*1-4=0
1+3-4=0
0=0
1 votes
Thanks 2
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Lista de comentários
a=1 b= 3 c = -4 Δ=b²-4ac = 3²-4*1*(-4) = 9+16 Δ=25 √Δ = √25 = 5
S={-4, 1}
b=3
c=-4
Δ=b²-4ac
Δ=3²-4*1*(-4)
Δ=9+16
Δ=25
X'=(-b+√Δ)/2a
X'=(-3+
X'=(-3+5)/2*1
X'=-3-5/2
X'=-8/2
X'=-4
X"=-3+5/2
X"=2/2
X"=1
Tirando a prova:
Para X'=-4
x²+3x-4=0
-4²+3*(-4)-4=0
16+-12-4=0
16-16=0
0=0
Para X"=1
1²+3*1-4=0
1+3-4=0
0=0