Question

Resolvam ?
A) -3x²+48=0

B) x²-144=0

C) 2x²+x=0

Answer 1

a)
- 3x² + 48 = 0
- 3x² = - 48
3x² = 48
x² = 48/3
x² = 16
x = √16
x = + 4 e x = - 4
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b)
x² - 144 = 0
x² = 144
x = √144
x = + 12 e x = - 12
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c)
2x² + x = 0
x(2x + 1) = 0
x = 0

2x + 1 = 0
2x = - 1
x = - 1/2

R.: x = 0 e x = - 1/2