the length of a rectangle is 5 x + 3 and breadth is 2 x + 1 find its area
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length a is = 5x +3
breadth b is = 2x + 1
area of rectangle = a x b
= (5x+3)(2x+1)
= 5x(2x+1) +3(2x+1)
= 10x2 +5x +6x +3
= 10x2 +11x + 3
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