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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

High School Mathematics
2.70 Problems on Radicals Using Formulas - II

Example:
Expand (Ö3 - Ö2)2.
Solution:
The above problem in the form of (a - b)2 = a2 - 2ab + b2.
Here a = Ö3 and b = Ö2, substitute these values in the above formula, we get,
(Ö3 - Ö2)2 = (Ö3)2 - 2 Ö3 * Ö2 + (Ö2)2
= 3 - 2Ö6 + 2
= 5 - 2Ö6.
Directions: Solve the following problems. Also write at least ten examples of your own.
Q 1: Expand (Ö19 - Ö3)2.
20 - 2Ö57
22 - 2Ö57

 Q 2: Expand (Ö17 - Ö7)2.
22 - 2Ö119
24 - 2Ö119

Q 3: Expand (Ö11 - Ö7)2.
18 - 2Ö77
16 - 2Ö77

 Q 4: Expand (Ö13 - Ö5)2.
16 - 2Ö65
18 - 2Ö65

Q 5: Expand (Ö11 - 3)2.
17 - 6Ö11
17 - 2Ö11

 Q 6: Expand (Ö10 - Ö5)2.
13 - 2Ö50
15 - 2Ö50

Q 7: Expand (Ö17 - Ö2)2.
17 - 2Ö34
19 - 2Ö34

 Q 8: Expand (Ö7 - Ö8)2.
13 - 2Ö56
15 - 2Ö56

Question 9: This question is available to subscribers only!

 Question 10: This question is available to subscribers only!


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