Use the formula to find the value of 102 x 98
Answers
Answered by
4
Answer:
Using the identity (x+a)(x+b) = x
2
+(a+b)x+ab
Writing 102 as 100+2 and 98 as 100−2
Hence (100+2)(100−2) = 100
2
+[2+(−2)]100+(2)(−2)
= 10000+(0)100−4
= 9996
The answer is 9996
Step-by-step explanation:
i hope this answer is right
Answered by
8
Answer: 9996
Step-by-step explanation:
102x98
= ( 100 + 2 ) x ( 100 - 2 )
= 100²- 2²
= 10000 - 4
= 9996
KEY POINT : USE THE FORMULA
(a+b)(a-b) = a²-b². Here, we have taken a = 100 and b = 2.
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