Explain how to determine (calculate) the perfect squares

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

What is the 12th term of b(n)=-4-2(n-1)

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1