Question

EU QUERO AS CONTAS PFV


A) 3x^2-27=0

B)x^2-7x=0

C) 5x^2+15x=0

Answer 1

Boa tarde

aI

3x² - 27 = 0

3x² = 27

x² = 9

x1 = 3

x2 = -3

bI

x² - 7x = 0

x*(x - 7) = 0

x1 = 0

x2 = 7

c)

5x² + 15x = 0

x² + 3x = 0

x*(x + 3) = 0

x1 = 0

x2 = -3