Question

Equaçao do 2* grau incompleta

A)= 5x2-3125=0

B)= x2-3x=0

Answer 1

a)5x²-3125 = 0

∆= 0² - 4(5)(-3125)
∆= 62500

x= 0±√62500 : 2(5)
x= ±250 : 10
x= ±25

b)x²-3x=0
∆= (-3)² -4(1)(0)
∆= 9

x=-(-3)±√9 : 2(1)
x= 3±3 : 2
x'= 3+3 : 2 = 9:2 = 4,5
x"= 3-3 : 2 = 0:2 = 0