Complete the equation: x^2 – 14x + __= (_)^2

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)