Question

Use a suitable identify to get each of the following product.
(2.1m–0.8)(2.1m+0.8)

Answer 1

Answer:

4.41m^2 - 0.64

Step-by-step explanation:

(2.1m - 0.8)(2.1m + 0.8)

{ (a+b)(a-b) = a^2 - b^2 }

(2.1m)^2 - (0.8)^2

4.41m^2 - 0.64

Answer 2

Answer:

(2.1m-0.8)(2.1m+0.8)

(a-b)(a+b )=a^-b^

(2.1m-0.8)(2.1m+0.8)=(2.1m)^-(0.8)^

=4.41m^-0.64

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