Question

qual o valor de C na equação X2-25=0?

Answer 1

a=1 b=0 c=-25 

Δ = b² - 4ac 
Δ = 0²-4.1.-25 
Δ = 0+100 
Δ = 100 

x = -b+-vΔ/2a 
X=-0+-v100/2 
x=-0+-10/2 

x'=-0+10=10/2 =5 

x''=-0-10=-10/2= -5 

S{-5,5}