Question

respondam para mim pfv

a)6y²+9=63

b)2y²+18=24

c)10x²-18x=0

Answer 1

a) 6y² + 9 = 63

6y² = 63 - 9
6y² = 54
y² = 54/6
y² = 9
y = ± √9
y = ± 3

S={ -3, 3 }

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b) 2y² + 18 = 24

2y² = 24 - 18
2y² = 6
y² = 6/2
y² = 3
y = ± √3

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c) 10x² - 18x = 0


x (10x - 18) = 0
x = 0

10x - 18 = 0
10x = 18
x = 18/10
x = 9/5


S={ 0, 9/5 }