Question

Evaluate using identities
a) 99.2x100.8

please give me answer .​

Answer 1

Answer:

Rewrite the number as a sum or difference of two numbers and apply the identity (a+b)2 or (a-b)2 to arrive at the solution. All questions are represented in the form a2 - b2. Use the expanded form (a+b) (a-b) of the identity a2 - b2 to evaluate these numerical expressions.

Answer 2

Step-by-step explanation:

100-0.8 × 100+0.8

(a-b)×(a+b)= a*2-b*2

therefore

a*2=100×100

b*2=0.8×0.8

10000-0.64 = 9999.36

Hope you understand

BTW a*2 is a square and b*2 is b square