
Цели изрази
Authored by Galina Mahuleva
Mathematics
7th Grade
Used 23+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ако x + 2y = 5, то стойността на израза 3x + 6y – 5 е:
А) 0
Б) 10
В) 15
Г) 20
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Нормалният вид на многочлена (x – 5y)2 e:
А) x2 – 10xy + 25y2
Б) x2 – 10xy + 5y2
В) x2 – 10xy + 10y2
Г) x2 – 25y2
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Изразът (1 + 2x)(2x – 1) – 8(0,5x2 + 1) + (–3)2 е тъждествено равен на:
А) 8x2
Б) 8x2 – 18
В) 0
Г) -18
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Произведението (x + 1)(1 – x)(x2 – x + 1)(1 + x + x2) е тъждествено равно на:
А) x6 – 1
Б) 1 – x6
В) x6 – 3
Г) 1 – x5
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Нормалният вид на многочлена (2 – x)(–x) – (x + 6)2 е:
А) –14x – 36
Б) 10x + 36
В) –12x – 34
Г) 34
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Тричленът 9y2 – 12y + 4 е равен на квадрата на двучлена:
А) 9y – 2
Б) 9y – 4
В) 3y + 2
Г) 3y – 2
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Равенството 27 + u + 9x2 – x3 = (3 – x)3 е тъждество, когато:
А) u = –27x
Б) u = –9x
В) u = 27x
Г) u = 9x
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