Find the product using suitable identity
a. (7mn+1)(7mn+1)
b. 103 x 107
Answers
Answered by
3
A.)(7mn)² + 2(7mn)(1) + (1)²
49m²n²+14mn + 1
B.) (100+3)(100+7)
(100)²+ (3+7)100 (3)(7)
10000+1000+21
11021
Answered by
0
105×107
=(100+5)(100+7) [Using, (x+a)(x−b)=x
2
+(a+b)x+ab]
=(100)
2
+(5+7)×100+5×7
10000+1200+35
=11235
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