1. Tenglamalar sistemasini yeching

9-sinf

1.Tenglamalar sistemasini yeching.

2.x²-8x+3=0 tenglamaning

ildizlari x₁ va x₂ bo’lsa x₁²x₂+x₁ x₂² ni toping.

3.y=x² parabolaning

Y=3-2x to’g’ri chiziq bilan kesishish nuqtalarining koordinatalarini toping.

4.Agar AB=6cm, AC=4cm, LA=30⁰ bo’lsa, ABC uchburchak yuzini toping.

5.ABC uchburchakda AC=3cm, BC=4cm va LC=60⁰ bo’lsa AB ni toping.

Yozma ish.

1.Tenglamani yeching.

=

2.

3.Hosilani hisoblang.

Y= +

4.Uchlari A(1:2:3), B(2:3:1), C(3:1:2) nuqtalarda bo’lgan uchburchakning perimetrini toping.

5.A(0:1:2), B(1:-1:2), C(3:1:2), D(2:-3:1) nuqtalarberilgan. AB va CD vektorlar orasidagi burchakning kosinusini toping.