What are the zeros of the function f(x)= x^2 - 13x - 30

Anne is twice as old as bill, and bill is 3 years older than christie. the sum of anne s and christie s ages equal 72. find their age difference.?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Solve the equation by completing the square. x^2+2x=17