How can i change my age on

so 2 years ago i made my account and i thought i was supposed to be like 18+ or something so i made a fake age and now i want to know how can i change it? thanks!

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Which matrix multiplication is possible?

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103