Question

Solve the following problems using special product. SHOW YOUR SOLUTION.

1.) Find the area of a square whose side measures (7+4k) inches. ​

Answer 1

49 + 56k + 16 k^2

Explanation:

The area of a square is found by

A = s^2 where s is the side length

A = ( 7 + 4k) ^2

We can use ( a+ b) ^2 = a^2 + 2ab + b^2 where a = 7 and b = 4k

A = 7^2 + 2 * 7 * 4k + ( 4k) ^2

= 49 + 56k + 16 k^2