Rewrite the function by completing the square. f(x)=x2−9x+14f(x)= x^{2} -9 x +14 f(x)=x 2 −9x+14 f, left parenthesis, x, right parenthesis, equals, x, squared, minus, 9, x, plus, 14 f(x)=f(x)= f(x)= f, left parenthesis, x, right parenthesis, equals (x+(x+ (x+ left parenthesis, x, plus )2+)^2+ ) 2 + right parenthesis, squared, plus