Answer:
42 units²
Explanation:
Formula to find the area of a rectangle.
Area = Length × Width
According to the question,
Area = ( 2c + 1 ) ( 3 + c )
= 2c ( 3 + c ) + 1 ( 3 + c )
= 6c + 2c² + 3 + c
= 2c² + 7c + 3
Now, they have given that,
c = 3
So, now let us put 3 instead of c to the equation and let us find the area of the rectangle.
Area = 2c² + 7c + 3
= 2 × (3)² + 7 × 3 + 3
= 2 × 9 + 21 + 3
= 18 + 21 + 3
= 42 units²
Hope this helps you :-)
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