Question

calculate the perimeter of a rectangle whose 25x^2 - 35x + 12​

Answer 1

given, area= 25x²-35x+12.

to find, 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)..

breadth=5x-3. now, perimeter= 2(l+b) = 2 [ ( 5x-4) + (5x-3)] = 2 [5x-4+5x-3] = 2 (10x-7)