Question

resolva a equacao 6x²+7x=0 e -x²+5=0 urgente

Answer 1

1)

6x² + 7x = 0 

x.(6x + 7) = 0

x = 0 

ou 

6x + 7 = 0  --->  6x = - 7  -->  x = - 7 / 6

S = {0, - 7/6}

2)

- x² + 5 = 0 

(-1)

x² - 5 = 0 

x² = 5

x = + - √5

S = {√5, - √5}