The area of a rectangle is (x^2 −3x −40 ) square units. If the length is ( x+5 ) units, then find its breadth.
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L = ( x+5 )
Area of rectangle = L × B
( x² - 3x - 40 ) = ( x+5 ) × B
( x² + 5x - 8x - 40 ) = ( x+5 ) × B
x( x+5 ) - 8( x+5 ) = ( x+5 ) × B
( x+5 )×( x-8 ) = ( x+5 ) × B
( x-8 ) = B
B = ( x-8)
Therefore breadth (B) = (x-8) unit
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