многочлены

многочлены

7th Grade

14 Qs

quiz-placeholder

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многочлены

многочлены

Assessment

Quiz

Mathematics

7th Grade

Hard

Created by

Дарья Щепалова

FREE Resource

14 questions

Show all answers

1.

FILL IN THE BLANK QUESTION

2 mins • 1 pt

Упростите выражение

 5x2(5x1)(x+4)5x^2-\left(5x-1\right)\left(x+4\right)   и найдите его значение при  x=0,1x=0,1  

2.

FILL IN THE BLANK QUESTION

2 mins • 1 pt

Решите уравнение:

 9y2(3y1)(3y2)=169y^2-\left(3y-1\right)\left(3y-2\right)=16  

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Упростите выражение

 (3a+5b)(2a3)(10ab+6a2)\left(3a+5b\right)\left(2a-3\right)-\left(10ab+6a^2\right)  

 9a15b-9a-15b  

 9a+15b-9a+15b  

 9a+15b9a+15b  

 9a15b9a-15b  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Представьте в виде многочлена выражение

 (5+2y)(y2+2y3)\left(5+2y\right)\left(y^2+2y-3\right)  

 5y2+10y155y^2+10y-15  

 2y3+9y2+4y152y^3+9y^2+4y-15  

 5y2+10y+155y^2+10y+15  

 2y39y2+8y152y^3-9y^2+8y-15  

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Запишите в виде многочлена выражение

 (3y2)(y2y+1)\left(3y-2\right)\left(y^2-y+1\right)  

 2y2+2y2-2y^2+2y-2  

 3y33y2+3y3y^3-3y^2+3y  

 3y35y2+5y23y^3-5y^2+5y-2  

 3y2+5y2+5y23y^2+5y^2+5y-2  

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Выполните умножение

 (23x)(4x+1)\left(2-3x\right)\left(4x+1\right)  

 8x+28x+2  

 5x12x2+25x-12x^2+2  

 12x23x+2-12x^2-3x+2  

 8x23x8x^2-3x  

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Упростите выражение

 (3a7b)(2a+3b)+5ab\left(3a-7b\right)\left(2a+3b\right)+5ab  

 6a2+21b26a^2+21b^2  

 6a221b26a^2-21b^2  

 6a221b2+5ab6a^2-21b^2+5ab  

 6a214ab+9ab21b2+5ab6a^2-14ab+9ab-21b^2+5ab  

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