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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
4.41 Solving Problems Using Formula for (a-b)2

Example: Find the value of (48)2 using formula.
Solution: We can write (48)2 = (50-2)2
This is the form of (a-b)2 = a2 - 2ab + b2
= (50)2 + 2.50.2 + 22
= 2500 - 200 + 4
= 2504 - 200
= 2304


Directions: Solve the following problems using the formula. Also write at least ten examples of your own.
Q 1: Find the value of (79)2 using formula.
3364
6241
6084

Q 2: Find the value of (249)2 using formula.
62001
65001
63001

Q 3: Find the value of (38)2 using formula.
1444
1644
2044

Q 4: Find the value of (58)2 using formula.
3364
9801
6084

Q 5: Find the value of (78)2 using formula.
6084
3364
9801

Q 6: Find the value of (199)2 using formula.
39601
39401
39501

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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