Rewrite the function by completing the square. f(x)= 2 x^{2} +13 x +20f(x)=2x 2 +13x+20f, left parenthesis, x, right parenthesis, equals, 2, x, squared, plus, 13, x, plus, 20 f(x)=f(x)=f, left parenthesis, x, right parenthesis, equals (x+(x+left parenthesis, x, plus )^2+) 2 +right parenthesis, squared, plus