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1.(a + b)²

This is easy. On a piece of paper, make a square of length (a + b) [Choose a and b as per your wish t be any two lengths].Its area represents (a + b)². Make another square of side a, and another of side b.

Make a rectangle of side 2a and b or 2b and a, whichever is convenient.

Put the side a square, side b square and the rectangle on the bigger square of side (a + b). You can show that this fits perfectly, thus proving the identity.

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12y ago
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11y ago

use an abacus.
these answers are all wrong

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Wiki User

11y ago

-- Draw any shape.

-- Photocopy it OR draw it again.

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