There's no way to know that until you know the value of ' d ' .
If the assignment is to factor that expression, then here is the factored form:
d3 + d2 = d2 (d + 1)
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d2 + 8d + 7 = (d + 7) (d + 1)
A circle within a square has a diameter equal to the side of the square = ' D '. Area of the square = D2 Area of the circle = pi R2 = pi (D/2)2 = pi/4 D2 Area inside the square but outside the circle = D2 - (pi/4 D2) = (1 - pi/4) D2 = 0.2146 D2(rounded)
(d - 8)(d - 4)
The Armstrong numbers from 0 to 10000 are 1,153, 370, 371, 407!! That's it Nothing more and nothing less ;) Let k be the number of digits in a number, n, and d1,d2,d3,d4... be the digits of n. Say n=370. Then k=3 and d1=3, d2=7 and d3=0. Now 33+73+03=370. So 370 is an Armstrong number. Armstrong iff n=d1k+d2k+d3k+d4k+...
Suppose the number is n/d. Then n/d >= d => n <= d2 if d < 0 or n >= d2 if d > 0.