Algebraic identities

Algebraic identities

8th Grade

8 Qs

quiz-placeholder

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Algebraic identities

Algebraic identities

Assessment

Quiz

Mathematics

8th Grade

Practice Problem

Hard

Created by

URVASHI SINGH

Used 178+ times

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If a+b=7, ab = 10, find a2 + b2

28

29

30

27

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Use identity to find , (x-6)(x-19)

x2 - 25x +114

x2 - 25x -114

x2 + 25x +114

x2 + 25x -114

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 If x2 + 1x2 = 18, find x  1xIf\ x^2\ +\ \frac{1}{x^2}\ =\ 18,\ find\ x\ -\ \frac{1}{x}  

4

-4

 +4+-4  

16

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If area of the triangle is 24 ( x2yz + xy2z + xyz2) and its length is 8xyz, then its breadth is ?

3(x + y + z)

3xyz

3(x + y - z)

none

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Using identity find 201 x 199

3000

3999

39999

31111

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find 872 - 132

7200

7300

7400

7500

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Find (2l – 3m + 4n)2

4l2 - 9m2 + 16n2 – 12lm + 24mn + 16nl

4l2 + 9m2 + 16n2 + 12lm – 24mn + 16nl

4l2 + 9m2 + 16n2 – 12lm + 24mn + 16nl

4l2 + 9m2 + 16n2 – 12lm – 24mn + 16nl

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