Calculate the dimentions of a rectangle whose area is 25x2 – 35x + 12 *
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Calculate the dimentions of a rectangle whose area is 25x2 – 35x + 12??
area= 25x²-35x+12
perimeter of a rectangle.
so, by factorising the area
(25x²-35x+12)
25x²-35x+12
= 25x²-15x-20x+12
now taking the commons,
=5x(5x-3) -4(5x-3)
=(5x-4) (5x-3).
now,
length = 5x-4
breadth=5x-3
now,
perimeter= 2(l+b)
= 2 [ ( 5x-4) + (5x-3)]
= 2 [5x-4+5x-3]
= 2 (10x-7)
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