resolva as equações do 2 grau sendo o conjunto U=R?
1) ( y+5)(y-1)=2y-5S
2)Y²-10=)S
3)2X²+50=0s
4)-5R²+20=0s
5)9A²=25 s
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1) ( y+5)(y-1)=2y-5S
2)Y²-10=)S
3)2X²+50=0s
4)-5R²+20=0s
5)9A²=25 s
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Verified answer
1)
(y + 5)*(y - 1) = 2y - 5
y² + 4y - 5 = 2y - 5
y² + 2y = 0
y*(y + 2) = 0
y1 = 0
y2 = -2
2)
y² - 10 = 0
y² = 10
y1 = -√10
y2 = +√10
3)
2x² + 50 = 0
x² = -25 não existe solução em R
4)
-5R² + 20 = 0
5R² = 20
R² = 4
R1 = -2
R2 = +2
5)
9A² = 25
A² = 25/9
A1 = -5/3
A2 = +5/3
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