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Adrielle10
@Adrielle10
April 2020
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Determine os valores de x e y na proporção x/5 e y/10, Sabendo-se que x^2+y^2=20.
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MATHSPHIS
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Substituindo em
x=2
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3478elc
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x = y ==> x= 5y==> x = y
5 10 10 2
x^2+y^2=20
(1/2y)^2 + y^2 = 20
1/4y^2 + y^2 = 20
y^2 + 4y^2 = 80
5y^2 =80
y^2 =16
y =+/- 4
y1=4 ==> x1 = 4/2 ==>x1=2
y2=-4==>x2 = - 4/2==> x2= - 2
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Lista de comentários
Verified answer
Substituindo em
x=2
Verified answer
x = y ==> x= 5y==> x = y
5 10 10 2
x^2+y^2=20
(1/2y)^2 + y^2 = 20
1/4y^2 + y^2 = 20
y^2 + 4y^2 = 80
5y^2 =80
y^2 =16
y =+/- 4
y1=4 ==> x1 = 4/2 ==>x1=2
y2=-4==>x2 = - 4/2==> x2= - 2