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Katiany11
@Katiany11
December 2019
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Determine o conjunto solução da equação irracional da foto:
raiz(x+5) = 1-x
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√x+5²=(1-x)²
x+5=1²-2.1.x+x²
x+5=1-2x+x²
1-2x+x²=x+5
x²-2x-x-5+1=0
x²-3x-4=0
Δ=(-3)²-4.1.(-4) x1=3+5/2=8/2=4
Δ=9+16 x2=3-5/2=-2/2=-1
Δ=25
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x+5=1²-2.1.x+x²
x+5=1-2x+x²
1-2x+x²=x+5
x²-2x-x-5+1=0
x²-3x-4=0
Δ=(-3)²-4.1.(-4) x1=3+5/2=8/2=4
Δ=9+16 x2=3-5/2=-2/2=-1
Δ=25