Question

determine a soma e o produto das raizes das equacoes:
a) 4x2 -5x +1=0
b) 5x2+10x-13=0

Answer 1

a) 4x2 -5x +1=0 
8 - 5x +1 = 0
-5x = -8 -1
-5x = -9 *(-1)
5x = 9
x=9/5
 
b) 5x2+10x-13=0
10 + 10x -13 = 0
10x = 13-10
10x = 3
x=3/10