Question

o conjunto da soluçao literal x²-(a-b)x-ab=0 e:
a:(-b,a)
b:(a)
c:(b,-a)
d:(-b,-a)

Answer 1

$x^2-(a-b)x-ab=0\longrightarrow(x-a)(x+b)=0\left\langle\begin{array}{lcl}x-a=0\longrightarrow\boxed{{x}=a}\\x+b=0\longrightarrow\boxed{{x}=-b}\end{array}\right\\\\\text{Alternativa a).}$