Question

equação do 2· grau
4x2-5x =0

Answer 1

4x² -5x= 0? x(4x-5)=0 x'=0 x"=> 4x-5=0 4x=5 x"=5/4 

Answer 2

a= 4, b= -5

Δ= 25

x= (+5+-5)/2.4
x' = 10/8 → x' = 5/4

x"= 0/8

S={ 5/4, 0/8}