Question

1) resolva a equação do 2 grau
A) x^2 -15x= 0
B) x^2-81= 0

Answer 1

Resposta:

a) x² - 15x = 0

x(x - 15) = 0

x = 0

ou x - 15 = 0

x = 15

b) x² - 81 = 0

x² = 81

x = -9 ou x = 9

Answer 2

Resposta:

a) ×^2-15x=0

x (1x-15)=0

x=0

x=15

b) x^2-81=0

x=_/81

x= 9

×= 0