7-sinf uchun test sinov uchun

Agar a = - 5, b = 6 bo`lsa a² – 2ab + b² ni hisoblang.

• 121

• 1

• 100

• 144

Ona farzandlari uchun a so’mdan 8 ta rasm daftar, b so’mdan 5ta ruchka c so’mdan 20 ta daftar sotib oldi. Jami haridni hisoblash uchun ifoda tuzing?

• 33(a+b+c)

• 8a+25(b+c)

• 800abc

• 8a+5b+20c

Tenglamani yeching: 3x + 21 = 5x + 43

Soddalashtiring: a(a – b)c – b(b – c)a

• a²c – ab²

• ac²– ab²

• a²c – a²b

• ac²

Qaysi fikr har doim to’g’ri?

• Uchburchakda ikkita to’g’ri burchak bo’ladi;

• Uchburchakda ikkita o’tmas burchak bo’ladi;

• Uchburchakda faqat bitta o’kir burchak bo’ladi;

• To’g’ri burchakli uchburchakda bitta o’tkir burchak bor.

Uchburchakning burchaklari 2:7:9 nisbatda bo’lsa, eng kichik burchakni toping.

• 60

• 40

• 20

• 10