Question

x²-3x-10=0 quanto e essa equação ?

Answer 1

x²-3x-10=0

Δ=b²-4ac
Δ =(-3)²-4*1*(-10)
Δ =9+40
Δ =49

x=-b±√Δ/2a
x=-(-3)±√49/2*1
x=3±7/2

As raizes:

x'=3+7/2
x'=10/2
x'=5

x"=3-7/2
x"=-4/2
x"=-2

Resposta: x'=5 e x"=-2