Solve `x^2-10=0` :
(To solve means to find the values that make the function zero -- to find the solutions, zeros, or roots. If you are given an equation, to solve means to find values for the variables so that the equation is true.)
`x^2=10` Undo the subtraction by adding 10 to both sides
`x=+-sqrt(10)` Undo the square by taking the square root of both sides. Note that there will be two answers -- if x<0 when it is squared the value will be positive.
The solutions are `x=sqrt(10),x=-sqrt(10)`