Question

x²+x-30=0
x'+x"=?
x'.x"=?
x'= x"=

Answer 1

1+120

Δ=121

-1+-11/2

X'=10/2 =  5 

X''=-12/2 = -6 

X'+x''
5+(-6)
5-6=-1
X'.x''
5.-6=-30

X'=5 x''=-6  

Espero ter ajudado !