`(9!-8!)/(7!)` is equal to

If the centroid and two vertices of a triangle are (4,-8),(-9,7),(1,4) and the area of the triangle (in sq.units) is "K" ,then (8)/(333)K is equal to

Evaluate : (1)/((sqrt(9)-sqrt(8))) is equal to

(-9)^(3)-:(-9)^(8) is equal to

""^(15)C_(8) + ""^(15)C_(9) - ""^(15)C_(6) - ""^(15)C_(7) is equal to ………. .

If (x,3)+(2,5)=(7,8) then x is equal to a)2 b)5 c)7 d)9