Question

Evaluate the following products without multiplying directly
a) 102 x 105
b) 97 × 103​

Answer 1

Answer:

102 can be written as 100 + 2

105 can be written as 100 + 5

Step-by-step explanation:

(100+2) (100+5)

using the identity (x+a) (x+b) = X2 + (a+b)x + ab

(100) square + (2+5)*100 + 2*5

10000 + 700 + 10

10700+10

10710......

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