Question

resolva

a) x² - 8x = 0

b) x² + 3x = 0

c) 9x² = 5x

d) 5x² = 10x

Answer 1

x2- 8x -0 =0
delta =b2 - 4ac
delta= 64 -0
delta =64

-b +- raíz de delta/2a
-8 +- 8 / 2
0/2=0
-16/2=-8