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(13th) QUESTION :
the length of the side of a square is ( 5x + 11 )cm . then find the area of square.
SOLUTION :
we know the area of square =>
=> S × S = S²
A side is given about 5x +11 cm
therefore,
=> ( 5x + 11 ) (5x + 11 )
=> 5x ( 5x + 11 ) +11 ( 5x + 11 )
=> 25x² +55x +55x + 121
=> 25x² + 110x + 121
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