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3 years ago

WILL GIVE BRAINLIEST!

Mathematics

1 answer:

siniylev [52]3 years ago

8 0

Answer:

48x² + 24x + 3

Step-by-step explanation:

Width = (4x + 1) in

Length = 3 *width = 3*(4x + 1) = 3*4x + 3*1

= (12x + 3) in

Area of rectangle = length * width

= (12x + 3) (4x + 1)

= 12x *4x + 12x *1 + 3*4x + 3*1

= 48x² + 12x + 12x + 3

= 48x² + 24x + 3

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