Find the values of m and n if the following expression are perfect squares.
`x^(4)-8x^(3)+mx^(2)+nx+16`

Find the values of m and n if the following expression are perfect squares. (1)/(x^(4))-(6)/(x^(3))+(13)/(x^(2))+(m)/(x)+n

Find the values of a and b if the following polynomials are perfect squares 4x^(4)-12x^(3)+37x^(2)+bx+a

Find the values of m and n, if (x-m) and (x-n) are the factors of the expression x^(2)+mx-n

Find the values of m and n so that x-1 and x + 2 both are factors of x^3+(3m+1)x^2+nx-18 .