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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

High School Mathematics
2.71 Problems on Radicals Using Formulas - III

Example:
Expand (Ö3 + Ö2)(Ö3 - Ö2).
Solution:
The above problem in the form of (a + b)(a - b) = a2 - b2.
Here a = Ö3 and b =Ö2.
Substitute these values in the above formula we get,
(Ö3 + Ö2)(Ö3 - Ö2) = (Ö3)2 - (Ö2)2.
= 3 - 2
= 1
Directions: Solve the following problems. Also write at least ten examples of your own.
Q 1: Expand (Ö7 + Ö8) (Ö7 - Ö8).
-1
2
-2
1

 Q 2: Expand (Ö5 + Ö7) (Ö5 - Ö7).
2
-4
4
-2

Q 3: Expand (Ö19 + Ö3) (Ö19 - Ö3).
16
18
14
None of these

 Q 4: Expand (Ö17 + Ö2) (Ö17 - Ö2).
-15
17
15
-17

Q 5: Expand (Ö17 + Ö7) (Ö17 - Ö7).
16
8
10
14

 Q 6: Expand (Ö13 + Ö5) (Ö13 - Ö5).
8
-6
-8
6

Q 7: Expand (Ö10 + 2) (Ö10 - 2).
6
12
8
10

 Q 8: Expand (Ö11 + 3) (Ö11 - 3).
7
5
8
6

Question 9: This question is available to subscribers only!

 Question 10: This question is available to subscribers only!


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