makhananagirlie makhananagirlie

20-06-2021
Mathematics

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A square has sides of length (2 a-b) metres. Write down an expression for the area of the square and simplify it

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jimrgrant1 jimrgrant1

20-06-2021

Answer:

A = 4a² - 4ab + b²

Step-by-step explanation:

The area (A) of a square is calculated as

A = s² ( s is the side length ) , so

A = (2a - b)² ← expand using FOIL

= (2a)² - 2ab - 2ab + (- b)²

= 4a² - 4ab + b²

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