Question

alguem ????????????

Answer 1

Olá!!!

Resolução!!!

a) x² - 900 = 0

x² = 900
x = ± √900
x = ± 30

S={ -30, 30 }

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b) 2x² - 200 = 0

2x² = 200
x² = 200/2
x² = 100
x = ± √100
x = ± 10

S={ -10, 10 }

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c) 3y² - 300 = 0

3y² = 300
y² = 300/3
y² = 100
y = ± √100
y = ± 10

S={ -10, 10 }

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d) x² + 10x = 0

x.(x + 10) = 0
x = 0

x + 10 = 0
x = -10

S={ 0, -10 }

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e) 5y² + 50y = 0

y.(5y + 50) = 0
y = 0

5y + 50 = 0
5y = -50
y = -50/5
y = -10

S={ 0, -10 }

★Espero ter ajudado! tmj.