What are the zeros of the function f(x) = x2 + 5x + 5 written in simplest radical form?

After two years, how much has been paid into interest?

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

What expression is equivalent to 1/2(2+3x-6)