Matematika fanidan test. I variant. 2016-2017 o’quv yili

12. Agar x₁,x₂ tenglamaning ildizlari bo’lsa, ifodaning qiymatini toping.

A) B)-3 C) D)

13. ABC uchburchakning tomonlari AB=48, BC=80,AC=72. BD –uchburchakning bissektrissasi. AD ni toping.