Formule de calcul prescurtat

Formule de calcul prescurtat

7th Grade

15 Qs

quiz-placeholder

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Formule de calcul prescurtat

Formule de calcul prescurtat

Assessment

Quiz

Mathematics

7th Grade

Hard

Created by

Nicolae Popa

Used 73+ times

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculati (2x + 3)2\left(2x\ +\ 3\right)^2   

 2x2+92x^2+9  

 4x2+12x+94x^2+12x+9  

 4x2+94x^2+9  

 4x2+12x4x^2+12x  

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

( x + y )2 =
x2+2xy+y2
x2-2xy+y2
x2+y2
x2-y2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

( a + 4 )( a – 4 ) =
a2+16
a2-4
a2-8a+16
a2-16

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

( 3 – x )2 =
9+6x+x2
9-6x+x2
9-x2
9-3x+x2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

( 2a – 3b )2 =
4a2-12ab+9b2
4a2+12ab+9b2
4a2-9b2
4a2-6ab+9b2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Rezultatul calcului  (3+5)(35)\left(\sqrt{3}+\sqrt{5}\right)\left(\sqrt{3}-\sqrt{5}\right)  este un număr

natural

irațional

intreg

zecimal

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Rezultatul calcului  (327)(32+7)\left(3\sqrt{2}-\sqrt{7}\right)\left(3\sqrt{2}+\sqrt{7}\right)  este

10

25

11

-2

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