d2 + 8d + 7 = (d + 7) (d + 1)
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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)
(d - 8)(d - 4)
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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)