Solve for x. simplify completely. x^2-9=55

Simplifying x2 + -9 = 55 Reorder the terms: -9 + x2 = 55 Solving -9 + x2 = 55 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + x2 = 55 + 9 Combine like terms: -9 + 9 = 0 0 + x2 = 55 + 9 x2 = 55 + 9 Combine like terms: 55 + 9 = 64 x2 = 64 Simplifying x2 = 64 Take the square root of each side: x = {-8, 8}

A student divided the given number by 100 that resulted to 28.003 in his chart. So what we are looking for this situation is the value of the number before it was divided by 100.
To get the value, simply multiply the result by 100
  28.003 x 100
=2800.3