Question

rezolvati in multimea nr reale ecuatia: F(x)=(5-x)(10-x) cine mă ajuta?​

Answer 1

(5-x)(10-x) = 0

⇔  5-x = 0  ∨  10-x = 0

⇔  x = 5  ∨  x = 10

⇒  x ∈ {5; 10}