1.

Find the area of the square whose side is (x – 2)

Answer»

Side of a square = x – 2

∴ Area = Side × Side

= (x – 2) (x – 2) 

= x(x – 2) – 2(x – 2)

= x(x) + (x)(-2) + (-2)(x) + (-2)(-2)

= x – 2x – 2x + 4x2 – 4x + 4



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